Index: /CKTester/fort.js
===================================================================
--- /CKTester/fort.js	(revision 4844)
+++ /CKTester/fort.js	(revision 4845)
@@ -262,5 +262,8 @@
 			document.title = this.totalFailed + ' failed / ' + this.totalPassed + ' passed - CKEditor Core Tests Runner';
 
-			this.runCell();
+			var self = this;
+			setTimeout( function(){
+				self.runCell();
+			}, 0 );
 		},
 
@@ -293,8 +296,15 @@
 			if ( path.indexOf('://') == -1 && path.indexOf( '/' ) !== 0 )
 			{
+				// Webkit bug: Avoid requesting with original file name (MIME type)
+				//  which will stop browser from interpreting resources from same URL.
+				var suffixIndex = path.lastIndexOf( '.' ),
+					suffix = suffixIndex == -1 ? '' : path.substring( suffixIndex, path.length );
+
+				suffix && ( path = path.substring( 0, suffixIndex ) );
+
 				win = ( win || window );
 				var temp = win.document.createElement( 'img' );
 				temp.src = path;
-				return temp.src;
+				return temp.src + suffix;
 			}
 			else