VNC KDE crash with nvidia display drivers

[David J. Bakeman]

Apparently QT when closing X causes glXChannelRectSyncSGIX () to be 
called which casues a core dump.  This doesn't surprise me since there 
is NO GL extension with the vnc server I'm using.  The thing I don't 
understand is why it's calling a GL function in the first place.  This 
only seems to be a problem with NVidia and FC1 I don't remember having 
this problem with NVidia and RH7.3.  Anybody have any thoughts here???

Thanks

P.S. here's an examplke backtrace

#0  0x0709c1ca in glXChannelRectSyncSGIX () from /usr/lib/libGL.so.1
#1  0x0881c358 in ?? ()
#2  0x070cdb20 in ?? () from /usr/lib/libGL.so.1
#3  0x0881c358 in ?? ()
#4  0x0709e4b6 in glXChannelRectSyncSGIX () from /usr/lib/libGL.so.1
#5  0x0881c358 in ?? ()
#6  0x0881c358 in ?? ()
#7  0x00a1ea24 in ?? () from /usr/X11R6/lib/libX11.so.6
#8  0x08821218 in ?? ()
#9  0x0095643d in XCloseDisplay () from /usr/X11R6/lib/libX11.so.6
#10 0x0729ac7b in qt_cleanup() () from /usr/lib/qt-3.1/lib/libqt-mt.so.3
#11 0x007d2470 in _dl_runtime_resolve () from /lib/ld-linux.so.2
#12 0x072f6412 in QApplication::~QApplication() ()
   from /usr/lib/qt-3.1/lib/libqt-mt.so.3