Index: wp-admin/includes/plugin.php
===================================================================
--- wp-admin/includes/plugin.php	(revision 6603)
+++ wp-admin/includes/plugin.php	(working copy)
@@ -1,7 +1,7 @@
 <?php
 
 function get_plugin_data( $plugin_file ) {
-	$plugin_data = implode( '', file( $plugin_file ));
+	$plugin_data = implode( '', array_slice(file( $plugin_file ), 0, 30) );
 	preg_match( '|Plugin Name:(.*)$|mi', $plugin_data, $plugin_name );
 	preg_match( '|Plugin URI:(.*)$|mi', $plugin_data, $plugin_uri );
 	preg_match( '|Description:(.*)$|mi', $plugin_data, $description );