I also have this problem now I've upgraded to Edgy. This Firefox bug outlines the exact conditions for triggering this problem: https://bugzilla.mozilla.org/show_bug.cgi?id=304370
You need Composite turned on, and a 16-bit colour depth. Ubuntu needs to either apply a patch to nedit to work around the issue, or make sure nedit is always started with XLIB_SKIP_ARGB_VISUALS=1 set. -- nedit does not start https://launchpad.net/bugs/57808 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs