Index: config/index.php
===================================================================
--- config/index.php	(revision 15932)
+++ config/index.php	(working copy)
@@ -977,7 +977,7 @@
 			?>
 		<?php if( $conf->License == "cc" ) { ?>
 			<ul>
-				<li><?php aField( $conf, "RightsIcon", "<img src=\"" . htmlspecialchars( $conf->RightsIcon ) . "\" alt='icon' />", "hidden" ); ?></li>
+				<li><?php aField( $conf, "RightsIcon", "<img src=\"" . htmlspecialchars( $conf->RightsIcon ) . "\" alt=\"rights icon\" />", "hidden" ); ?></li>
 				<li><?php aField( $conf, "RightsText", htmlspecialchars( $conf->RightsText ), "hidden" ); ?></li>
 				<li><?php aField( $conf, "RightsCode", "code: " . htmlspecialchars( $conf->RightsCode ), "hidden" ); ?></li>
 				<li><?php aField( $conf, "RightsUrl", "<a href=\"" . htmlspecialchars( $conf->RightsUrl ) . "\">" . htmlspecialchars( $conf->RightsUrl ) . "</a>", "hidden" ); ?></li>
Index: includes/Exception.php
===================================================================
--- includes/Exception.php	(revision 15932)
+++ includes/Exception.php	(working copy)
@@ -99,7 +99,7 @@
 		<title>$title</title>
 		</head>
 		<body>
-		<h1><img src='$wgLogo' style='float:left;margin-right:1em' alt=''>$title</h1>
+		<h1><img src='$wgLogo' style='float:left;margin-right:1em' alt='Site logo'>$title</h1>
 		";
 	}
 
