cvsup 06/05/2003 breaks nvidia driver

I am not on my 5.1-BETA2 system right now, so I don't have any useful
details, but after CVSuping /usr/src early 05/06/2003 (after midnight), then
build world and recompiling and installing "my" kernel, the nvidia driver
"checks out" when X is loaded with a failure to initialize the driver.

The system in question has run 5.1-BETA1 and earlier 5.1-BETA2 code before
without any nvidia driver problem.

In the meantime, any suggestions on how to provide useful information, other
than just the XFree86.0.log file, would be helpful. I have used both of the
"native" nvidia driver and the ports-linux version (once), but tend to stay
with the "native" version (1.0-3203).