Index: wp-admin/includes/plugin.php
===================================================================
--- wp-admin/includes/plugin.php	(revision 5798)
+++ wp-admin/includes/plugin.php	(working copy)
@@ -18,7 +18,7 @@
 	$name = $plugin_name[1];
 	$name = trim( $name );
 	$plugin = $name;
-	if ('' != $plugin_uri[1] && '' != $name ) {
+	if ('' != trim($plugin_uri[1]) && '' != $name ) {
 		$plugin = '<a href="' . trim( $plugin_uri[1] ) . '" title="'.__( 'Visit plugin homepage' ).'">'.$plugin.'</a>';
 	}