Comment 5 for bug 505460

It might be of some help but I had the very same XFreeColormap() crash at the exact same location 0x033f0db0 mov 0x4d0(%esi),%eax
But in my case I was running a prog I wrote in C++ using QtCreator. The backtrace was:
0 XFreeColormap /usr/lib/libX11.so.6 0x033f0db0
1 ?? /usr/lib/libQtGui.so.4 0x02ce58d4
2 ?? /usr/lib/libQtGui.so.4 0x02ce52a8
3 QSystemTrayIcon::~QSystemTrayIcon() /usr/lib/libQtGui.so.4 0x02ccfda0
4 QObjectPrivate::deleteChildren() /usr/lib/libQtCore.so.4 0x00c8346f
5 QObject::~QObject() /usr/lib/libQtCore.so.4 0x00c8b7cf
Hope that'll help.