Strange Artifacts Under X 4.0.1 with NVidia Riva 128?

[Brent Fulgham <brent.fulgham@xpsystems.com>]

My X display shows strange artifacts under X 4.0.1.
I have an NVidia Riva 128-based graphics card
(Diamond Viper 330), which worked great under the
old X packages.

When I bring up X, light colored screen graphics
(such as menu bars, window frames, and many icons)
appear very dark.  Moving the window will usually
result in the graphic rendering properly (i.e.,
the window opens, and the window frame is too dark
to discern patterns.  Sliding the window to the
side a bit causes the window to re-render normally).

I've already played with the color depth settings
and so forth, but I suspect they do not have much
bearing on this problem.

Do others out there have Riva 128-based cards
that show similar problems?

Thanks,

-Brent