Comment 1 for bug 736551

I can confirm this with the LaTeX editor Kile. Probably the handling of .desktop files in '/usr/share/applications/kde4' is the problem, as the launcher item is added to the favorites just as 'kile.desktop'. Also, pinning and unpinning a KDE app will cause unity to crash (had not yet time to gather a backtrace, but it's likely the same as in bug 688803.