Index: wp-admin/press-this.php
===================================================================
--- wp-admin/press-this.php	(revision 12099)
+++ wp-admin/press-this.php	(working copy)
@@ -212,7 +212,7 @@
 						$src = 'http://'.str_replace('//','/', $host['host'].'/'.$src);
 					else
 						$src = 'http://'.str_replace('//','/', $host['host'].'/'.dirname($host['path']).'/'.$src);
-				$sources[] = esc_url($src);
+				$sources[] = esc_attr($src);
 			}
 			return "'" . implode("','", $sources) . "'";
 		}