I recently added a project profile "liferea". I tried adding the bug tracker URL
"http://sourceforge.net/apps/trac/liferea/". This lead to the effect that I now
cannot edit the bug tracker anymore while getting the hint that no bug tracker
was edited.

A screenshot of the effect: http://lzone.de/openhatch-screenshot.png

Expected behaviour: The project edit tab allows me to change/remove/readd the
bug tracker and provides an error message on invalid URLs.