Hi, yet another confirmation.
Yesterday I received a "BadWindow" console message (after yet another "Received unhandled X11 event" message) when closing the preferences dialog. My LyX runs on SuSE Linux 7.3, gcc-2.95.3 and xforms 0.89.6. These X window bugs happen now and then in different dialogs and "valgrind" dies without a comment. Personally, I think both unhandled X11 events and BadWindow errors appeared first about 2 months ago. John, you said it is an xforms bug. Could it be that someone removed a workaround in LyX? (Just an idea...) Michael