Can you get a backtrace with libgtk2.0-0-dbg and libglib2.0-0-dbg installed (maybe even gedit-dbgsym from http://wiki.ubuntu.com/DebuggingProgramCrash)?
Can you get a backtrace with libgtk2.0-0-dbg and libglib2.0-0-dbg installed (maybe even gedit-dbgsym from http:// wiki.ubuntu. com/DebuggingPr ogramCrash)?