After upgrading SuSE 9.3, Gtk menues (as in the Gimp or Azureus, to quote just two) menues appear with a black background and black text, which makes them totally useless. The only fix was doing apt-get remove gtk-qt-engine, which solved the problem. As is, the current gtk-qt-engine version is unusable.
*** This bug has been marked as a duplicate of 4276 ***
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