Double-click behavior in Diff editor does not work for Perforce diffs

The diff editor that shows up when doing Alt+P, Alt+D to get a diff of the current file with Perforce no longer allows double-clicking a piece of code to jump to that section with a regular editor. The behavior still works fine when using git.

Supposing it may have something to do with the filename marker at the top, here is an example:

--- //depot/XXX/closingkit/trunk/source/cui/src/cui_core.cpp	2012-02-08 13:54:01.000000000 0100
+++ P:/XXX\closingkit\trunk\source\cui\src\cui_core.cpp	2012-02-08 13:54:01.000000000 0100

This was already broken in 2.4, but I think it worked with 2.3 (though I haven't checked).