Comment 4 for bug 118750

It is xubuntu specific:
  * debian/patch: added patch to reduce margin size of launchers.
This patch is causing this issue ; if I rebuild the package without it, it works fine (it has also been reverted in debian xfce svn: http://svn.debian.org/wsvn/pkg-xfce/desktop/trunk/xfce4-panel/debian/patches/series?op=log&rev=1258&sc=0&isdir=0)

I've sent the fix to Gauvain, it should be uploaded soon.