diff --git a/Anvil/Tools/Account.pm b/Anvil/Tools/Account.pm
index 64c9269e..6a8a61ba 100755
--- a/Anvil/Tools/Account.pm
+++ b/Anvil/Tools/Account.pm
@@ -317,13 +317,25 @@ AND
 	if ($test_password_hash eq $user_password_hash)
 	{
 		# User passed a valid username/password. Create a session hash.
-		my ($session_hash, $session_salt) = $anvil->Account->_build_cookie_hash({uuid => $anvil->data->{cookie}{anvil_user_uuid}, offset => 0});
+		my ($session_hash, $session_salt) = $anvil->Account->_build_cookie_hash({
+			debug  => $debug,
+			uuid   => $user_uuid, 
+			offset => 0,
+		});
 		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
 			session_hash => $session_hash,
 			session_salt => $session_salt, 
 		}});
 		
-		my $query = "
+		if (not $session_hash)
+		{
+			# Something went wrong generating the session cookie, login failed.
+			$anvil->data->{form}{error_massage} = $anvil->Template->get({file => "main.html", name => "error_message", variables => { error_message => $anvil->Words->string({key => "error_0028"}) }});
+			return(1);
+		}
+		else
+		{
+			my $query = "
 UPDATE 
     users 
 SET 
@@ -332,15 +344,16 @@ SET
 WHERE 
     user_uuid         = ".$anvil->data->{sys}{use_db_fh}->quote($user_uuid)."
 ;";
-		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { query => $query }});
-		$anvil->Database->write({query => $query, source => $THIS_FILE, line => __LINE__});
-
-		$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => 1, key => "log_0183", variables => { user => $anvil->data->{cgi}{username}{value} }});
-		$anvil->Account->_write_cookies({
-			debug => $debug, 
-			hash  => $session_hash, 
-			uuid  => $user_uuid,
-		});
+			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { query => $query }});
+			$anvil->Database->write({query => $query, source => $THIS_FILE, line => __LINE__});
+
+			$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => 1, key => "log_0183", variables => { user => $anvil->data->{cgi}{username}{value} }});
+			$anvil->Account->_write_cookies({
+				debug => $debug, 
+				hash  => $session_hash, 
+				uuid  => $user_uuid,
+			});
+		}
 	}
 	else
 	{
@@ -377,6 +390,26 @@ sub logout
 	
 	# Delete the user's cookie data. Sending nothing to '_write_cookies' does this.
 	$anvil->Account->_write_cookies({debug => $debug});
+	
+	# Delete the user's session salt.
+	if ($anvil->data->{cookie}{anvil_user_uuid})
+	{
+		my $query = "
+UPDATE 
+    users 
+SET 
+    user_session_salt = '', 
+    modified_date     = ".$anvil->data->{sys}{use_db_fh}->quote($anvil->data->{sys}{db_timestamp})." 
+WHERE 
+    user_uuid         = ".$anvil->data->{sys}{use_db_fh}->quote($anvil->data->{cookie}{anvil_user_uuid})."
+;";
+		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { query => $query }});
+		$anvil->Database->write({query => $query, source => $THIS_FILE, line => __LINE__});
+
+		$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => 1, key => "log_0183", variables => { user => $anvil->data->{cgi}{username}{value} }});
+	}
+	
+	# Log that they're out
 	$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => 1, key => "log_0179"});
 	
 	return(0);
@@ -466,8 +499,6 @@ sub read_cookies
 	
 	if ($count < 1)
 	{
-	
-	die;
 		# The user in the cookie isn't in the database. The user was deleted?
 		$anvil->Account->logout();
 		
@@ -485,8 +516,18 @@ sub read_cookies
 	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { "users::user_session_salt" => $anvil->data->{users}{user_session_salt} }});
 	
 	# Generate a hash using today and yesterday's date.
-	my ($today_hash)     = $anvil->Account->_build_cookie_hash({uuid => $anvil->data->{cookie}{anvil_user_uuid}, offset => 0});
-	my ($yesterday_hash) = $anvil->Account->_build_cookie_hash({uuid => $anvil->data->{cookie}{anvil_user_uuid}, offset => -86400});
+	my ($today_hash) = $anvil->Account->_build_cookie_hash({
+		debug  => $debug, 
+		uuid   => $anvil->data->{cookie}{anvil_user_uuid}, 
+		salt   => $anvil->data->{users}{user_session_salt}, 
+		offset => 0,
+	});
+	my ($yesterday_hash) = $anvil->Account->_build_cookie_hash({
+		debug  => $debug,
+		uuid   => $anvil->data->{cookie}{anvil_user_uuid}, 
+		salt   => $anvil->data->{users}{user_session_salt}, 
+		offset => -86400,
+	});
 	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
 		today_hash     => $today_hash,
 		yesterday_hash => $yesterday_hash, 
@@ -514,6 +555,9 @@ sub read_cookies
 	}
 	else
 	{
+		### TODO: left off here. First check fails and the user is logged out.
+		#die;
+		
 		# The user's cookie is invalid, log the user out.
 		$anvil->Account->logout();
 		
@@ -796,7 +840,9 @@ WHERE
 
 =head2 _build_cookie_hash
 
-This takes a (user) UUID and offset (stated as seconds) and builds a hash approporiate for use in cookies (or a test hash to validate a read cookie hash).
+This takes a (user) UUID and offset (stated as seconds) and builds a hash approporiate for use in cookies (or a test hash to validate a read cookie hash). The resulting hash and the salt used to generate the hash are returned.
+
+If there is a problem, C<< 0 >> will be returned for both the hash and salt.
 
 Parameters;
 
@@ -822,6 +868,7 @@ sub _build_cookie_hash
 	
 	my $offset     = defined $parameter->{offset}     ? $parameter->{offset}     : 0;
 	my $user_agent = defined $parameter->{user_agent} ? $parameter->{user_agent} : $ENV{HTTP_USER_AGENT};
+	my $salt       = defined $parameter->{salt}       ? $parameter->{salt}       : "";
 	my $uuid       = defined $parameter->{uuid}       ? $parameter->{uuid}       : $anvil->data->{cookie}{anvil_user_uuid};
 	# I know I could do chained conditionals, but it gets hard to read.
 	$user_agent = "" if not defined $user_agent; 
@@ -829,25 +876,47 @@ sub _build_cookie_hash
 	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
 		offset     => $offset, 
 		user_agent => $user_agent, 
+		salt       => $salt, 
 		uuid       => $uuid, 
 	}});
 	
+	if (not $anvil->Validate->is_uuid({uuid => $uuid}))
+	{
+		$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => 0, priority => "err", key => "log_0020", variables => { method => "Account->_build_cookie_hash()", parameter => "uuid" }});
+		return(0, 0);
+	}
+	if (not $user_agent)
+	{
+		$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => 0, priority => "err", key => "log_0020", variables => { method => "Account->_build_cookie_hash()", parameter => "user_agent" }});
+		return(0, 0);
+	}
+	
 	my $date = $anvil->Get->date_and_time({date_only => 1, offset => $offset});
 	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { date => $date }});
 
-	my $session_string = $uuid.$date.$user_agent;
+	my $session_string = $uuid.":".$date.":".$user_agent;
 	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { session_string => $session_string }});
 	
+	if (not $salt)
+	{
+		$salt = $anvil->Get->_salt;
+		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { salt => $salt }});
+	}
+	
 	# Generate a hash, but unike normal passwords, we won't re-encrypt it.
-	my $answer = $anvil->Account->encrypt_password({password => $session_string, hash_count => 0});
-	my $hash   = $answer->{user_password_hash};
-	my $salt   = $answer->{user_salt};
+	my $answer = $anvil->Account->encrypt_password({
+		debug      => $debug, 
+		hash_count => 0,
+		password   => $session_string, 
+		salt       => $salt, 
+	});
+	
 	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 
-		hash => $hash,
-		salt => $salt, 
+		hash => $answer->{user_password_hash},
+		salt => $answer->{user_salt}, 
 	}});
 	
-	return($hash, $salt);
+	return($answer->{user_password_hash}, $answer->{user_salt});
 }
 
 =head2 _write_cookies
diff --git a/Anvil/Tools/Get.pm b/Anvil/Tools/Get.pm
index eace8ce9..dc691e8d 100755
--- a/Anvil/Tools/Get.pm
+++ b/Anvil/Tools/Get.pm
@@ -209,10 +209,19 @@ sub cgi
 			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { variable => $variable }});
 			push @{$cgis}, $variable;
 		}
-		
-		$cgi_count = @{$cgis};
-		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { cgi_count => $cgi_count }});
 	}
+	elsif (exists $cgi->{param})
+	{
+		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { 'cgi->{param}' => $cgi->{param} }});
+		foreach my $variable (sort {$a cmp $b} keys %{$cgi->{param}})
+		{
+			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { variable => $variable }});
+			push @{$cgis}, $variable;
+		}
+	}
+	
+	$cgi_count = @{$cgis};
+	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => $debug, list => { cgi_count => $cgi_count }});
 	
 	# If we don't have at least one variable, we're done.
 	if ($cgi_count < 1)
diff --git a/cgi-bin/home b/cgi-bin/home
index 04763582..a961c65a 100755
--- a/cgi-bin/home
+++ b/cgi-bin/home
@@ -70,7 +70,7 @@ my $body   = "";
 
 # If any jobs are pending/running, show the "unavailable" option.
 my $available = check_availability($anvil);
-$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { available => $available }});
+$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 3, list => { available => $available }});
 if (not $available)
 {
 	# Set the body to 'say::maintenance'.
@@ -79,7 +79,7 @@ if (not $available)
 
 # If there is no user account yet, then the system is new and needs to be reconfigured.
 my $configured = check_if_configured($anvil);
-$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { configured => $configured }});
+$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 3, list => { configured => $configured }});
 if (not $configured)
 {
 	$body = configure_striker($anvil);
@@ -90,7 +90,11 @@ else
 	$body = process_task($anvil);
 }
 
-my $buttons = $anvil->Template->get({file => "main.html", name => "button_bar"});
+my $buttons = $anvil->Template->get({file => "main.html", name => "button_bar", variables => {
+	anvil_button   => 0                                     ? $anvil->Template->get({file => "main.html", name => "anvil_button_on"})   : $anvil->Template->get({file => "main.html", name => "anvil_button_off"}),
+	striker_button => 0                                     ? $anvil->Template->get({file => "main.html", name => "striker_button_on"}) : $anvil->Template->get({file => "main.html", name => "striker_button_off"}),
+	user_button    => $anvil->data->{sys}{users}{user_name} ? $anvil->Template->get({file => "main.html", name => "user_button_on"})    : $anvil->Template->get({file => "main.html", name => "user_button_off"}),
+}});
 my $footer  = $anvil->Template->get({file => "main.html", name => "footer"});
 
 # Display the page.
@@ -130,7 +134,7 @@ sub process_task
 		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { "cgi::login::value" => $anvil->data->{cgi}{login}{value} }});
 		
 		# Woot!
-		my $failed = $anvil->Account->login({debug => 2});
+		my $failed = $anvil->Account->login({debug => 3});
 		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { failed => $failed }});
 		if (not $failed)
 		{
@@ -138,21 +142,26 @@ sub process_task
 			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { logged_in => $logged_in }});
 		}
 	}
+	elsif ((defined $anvil->data->{cgi}{logout}) && ($anvil->data->{cgi}{logout}{value}))
+	{
+		# Bye now!
+		$anvil->Account->logout({debug => 3});
+	}
 	else
 	{
 		# Is the user logged in?
 		# 0 - The cookies were read, the account was validated and the user's details were loaded.
 		# 1 - No cookie was found or read. The user needs to log in
 		# 2 - There was a problem reading the user's UUID (it wasn't found in the database), so the 
-		#     cookies were deleted (via C<< Account->_logout() >>. The user needs to log back in.
+		#     cookies were deleted (via C<< Account->logout() >>. The user needs to log back in.
 		# 3 - There user's hash is invalid, it is probably expired. The user has been logged out and
 		#     needs to log back in.
-		my $cookie_problem = $anvil->Account->read_cookies({debug => 2});
-		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { cookie_problem => $cookie_problem }});
+		my $cookie_problem = $anvil->Account->read_cookies({debug => 3});
+		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 3, list => { cookie_problem => $cookie_problem }});
 		if (not $cookie_problem)
 		{
 			$logged_in = 1;
-			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { logged_in => $logged_in }});
+			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 3, list => { logged_in => $logged_in }});
 		}
 	}
 	
@@ -252,13 +261,13 @@ sub check_if_configured
 		variable_source_uuid  => $anvil->Get->host_uuid, 
 		variable_source_table => "hosts", 
 	});
-	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
+	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 3, list => { 
 		configured    => $configured, 
 		variable_uuid => $variable_uuid, 
 		modified_date => $modified_date, 
 	}});
 	
-	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { configured => $configured }});
+	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 3, list => { configured => $configured }});
 	return($configured);
 }
 
@@ -269,12 +278,25 @@ sub check_availability
 	my ($anvil) = @_;
 	
 	my $available = 1;
-	my $query = "SELECT job_progress, modified_date, extract(epoch from modified_date) FROM jobs WHERE job_name = 'configure::network' AND job_progress != 100 AND job_host_uuid = ".$anvil->data->{sys}{use_db_fh}->quote($anvil->Get->host_uuid).";";
-	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { query => $query }});
+	my $query = "
+SELECT 
+    job_progress, 
+    modified_date, 
+    extract(epoch from modified_date) 
+FROM 
+    jobs 
+WHERE 
+    job_name      =  'configure::network' 
+AND 
+    job_progress  != 100 
+AND 
+    job_host_uuid =  ".$anvil->data->{sys}{use_db_fh}->quote($anvil->Get->host_uuid)."
+;";
+	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 3, list => { query => $query }});
 	
 	my $results = $anvil->Database->query({query => $query, source => $THIS_FILE, line => __LINE__});
 	my $count   = @{$results};
-	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
+	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 3, list => { 
 		results => $results, 
 		count   => $count,
 	}});
@@ -286,7 +308,7 @@ sub check_availability
 		my $unixtime    = $results->[0]->[2];
 		my $seconds_ago = $anvil->Convert->add_commas({number => (time - $unixtime)});
 		   $available   = 0;
-		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
+		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 3, list => { 
 			available   => $available,
 			percent     => $percent,
 			seconds_ago => $seconds_ago, 
@@ -300,10 +322,10 @@ sub check_availability
 			title       => "#!string!striker_0046!#",
 			description => $anvil->Words->string({key => "striker_0047", variables => { percent => $percent, timestamp => $timestamp, seconds_ago => $seconds_ago }}),
 		}});
-		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 'say::maintenance' => $anvil->data->{say}{maintenance} }});
+		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 3, list => { 'say::maintenance' => $anvil->data->{say}{maintenance} }});
 	}
 	
-	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { available => $available }});
+	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 3, list => { available => $available }});
 	return($available);
 }
 
diff --git a/html/skins/alteeve/main.html b/html/skins/alteeve/main.html
index b47416d5..c3912422 100644
--- a/html/skins/alteeve/main.html
+++ b/html/skins/alteeve/main.html
@@ -2,13 +2,13 @@
 			<table id="button_bar">
 				<tr>
 					<td>
-						<img src="#!data!skin::url!#/images/striker_icon_on.png" class="top_icon">
+						#!variable!striker_button!#
 					</td>
 					<td>
-						<img src="#!data!skin::url!#/images/anvil_icon_on.png" class="top_icon">
+						#!variable!anvil_button!#
 					</td>
 					<td>
-						<img src="#!data!skin::url!#/images/users_icon_on.png" class="top_icon">
+						#!variable!user_button!#
 					</td>
 					<td>
 						<a href="https://alteeve.com/w/Support" target="_new"><img src="#!data!skin::url!#/images/help_icon_on.png" id="help_icon" class="top_icon"></a>
@@ -17,10 +17,34 @@
 			</table>
 <!-- end button_bar -->
 
+<!-- start anvil_button_off -->
+<img src="#!data!skin::url!#/images/anvil_icon_off.png" class="top_icon">
+<!-- end anvil_button_off -->
+
+<!-- start anvil_button_on -->
+<a href="?anvil=true"><img src="#!data!skin::url!#/images/anvil_icon_on.png" class="top_icon">
+<!-- end anvil_button_on -->
+
+<!-- start striker_button_off -->
+<img src="#!data!skin::url!#/images/striker_icon_off.png" class="top_icon">
+<!-- end striker_button_off -->
+
+<!-- start striker_button_on -->
+<a href="?striker=true"><img src="#!data!skin::url!#/images/striker_icon_on.png" class="top_icon">
+<!-- end striker_button_on -->
+
+<!-- start user_button_off -->
+<img src="#!data!skin::url!#/images/users_icon_off.png" class="top_icon">
+<!-- end user_button_off -->
+
+<!-- start user_button_on -->
+<a href="?logout=true"><img src="#!data!skin::url!#/images/users_icon_on.png" alt="#!string!message_0033!#" class="top_icon">
+<!-- end user_button_on -->
+
 <!-- start config_step1 -->
 			<table>
 				<div id="config_step1_div">
-				<form name="config_step1" action="">
+				<form name="config_step1" action="" method="post">
 				<tr>
 					<td>
 						<span name="#!variable!step1_welcome_title_id!#" id="#!variable!step1_welcome_title_id!#" class="config_header1">#!string!striker_0001!#</span><br />
@@ -77,7 +101,7 @@
 <!-- start config_step2 -->
 			<table>
 				<div id="config_step1_div">
-				<form name="config_step1" action="">
+				<form name="config_step1" action="" method="post">
 				<tr>
 					<td colspan="2">
 						<span name="#!variable!step1_welcome_title_id!#" id="#!variable!step1_welcome_title_id!#" class="config_header1">#!string!striker_0001!#</span><br />
@@ -210,7 +234,7 @@
 <!-- start config_step3 -->
 			<table>
 				<div id="config_step3_div">
-				<form name="config_step3" action="">
+				<form name="config_step3" action="" method="post">
 				<tr>
 					<td>
 						<span name="#!variable!step1_welcome_title_id!#" id="#!variable!step1_welcome_title_id!#" class="config_header1">#!string!striker_0001!#</span><br />
@@ -332,7 +356,7 @@
 
 <!-- start striker-login -->
 			<table class="login"">
-				<form name="striker_login" action="">
+				<form name="striker_login" action="" method="post">
 				<div id="striker_login">
 				<tr>
 					<td>
diff --git a/share/words.xml b/share/words.xml
index fb78d299..855a63c7 100644
--- a/share/words.xml
+++ b/share/words.xml
@@ -58,6 +58,7 @@ NOTE: You must update the password of any other system using this host's
 		<key name="message_0030">Failed to write the new password to the temporary file: [#!variable!file!#]. Please check the logs for details.</key>
 		<key name="message_0031">Beginning configuration of local system.</key>
 		<key name="message_0032"><![CDATA[Forgot your password?<br />Use '<span class="code">anvil-change-password</span>' from the console to reset it.]]></key>
+		<key name="message_0033">Log out</key>
 		
 		<!-- Log entries -->
 		<key name="log_0001">Starting: [#!variable!program!#].</key>
@@ -400,6 +401,7 @@ Here we will inject 't_0006', which injects 't_0001' which has a variable: [#!st
 		<key name="error_0025">The user ID passed in to Account->read_details: [#!variable!uuid!#] is not a valid UUID.</key>
 		<key name="error_0026">The user ID passed in to Account->read_details: [#!variable!uuid!#] was not found in the database.</key>
 		<key name="error_0027">Login failed, please try again.</key>
+		<key name="error_0028"><![CDATA[There appears to be a problem with Striker. The login failed, please check: [<span class="code">#!data!sys::log_file!#</span>] for details.]]></key>
 		
 		<!-- These are works and strings used by javascript/jqery -->
 		<key name="js_0001">Up</key>