Index: /CKEditor/trunk/CHANGES.html
===================================================================
--- /CKEditor/trunk/CHANGES.html	(revision 4922)
+++ /CKEditor/trunk/CHANGES.html	(revision 4923)
@@ -51,4 +51,5 @@
 		<li><a href="http://dev.fckeditor.net/ticket/4863">#4863</a> : Fixing iframedialog's height doesn't stretch to 100%</li>
 		<li><a href="http://dev.fckeditor.net/ticket/4964">#4964</a> : The BACKSPACE key positioning was not correct in some cases with Firefox.</li>
+		<li><a href="http://dev.fckeditor.net/ticket/4773">#4773</a> : The fileBrowser plugin overwrote any onClick function for a fileButton element.</li>
 	</ul>
 	<h3>
Index: /CKEditor/trunk/_source/plugins/filebrowser/plugin.js
===================================================================
--- /CKEditor/trunk/_source/plugins/filebrowser/plugin.js	(revision 4922)
+++ /CKEditor/trunk/_source/plugins/filebrowser/plugin.js	(revision 4923)
@@ -279,5 +279,16 @@
 				if ( url )
 				{
-					element.onClick = uploadFile;
+					var onClick = element.onClick;
+					element.onClick = function( evt )
+					{
+						// "element" here means the definition object, so we need to find the correct
+						// button to scope the event call
+						var sender = evt.sender;
+						if ( onClick && onClick.call( sender, evt ) === false )
+							return false;
+
+						return uploadFile.call( sender, evt );
+					};
+
 					element.filebrowser.url = url;
 					element.hidden = false;