problem with nvidia graphics card and -current

I was setting up a system today with an nvidia Geforce4-MX 440          
graphics card.  I am not at the system at the moment but the -current   
sources were from about 2:00 PM CDT.  I installed the nvidia-driver     
port (1.0.4365) trying various combinations of WITH_FREEBSD_AGP,        
FORCE_AGP_RATE, and WITH_NVIDIA_HACKS.  I get the same result.  The     
first time an X server is started, everything works fine, including glx 
loading.  After exiting the X session and shutting down the server and  
then at some point later starting the X server again, the system will   
freeze.  No messages, no panic, nothing.  The only thing to do is hit   
the reset button.                                                       

Any ideas?  I saw some discussion about kernel changes made for wine and
nvidia but I am not sure if that is relevant in my case.

Thanks.

--
Glenn Johnson
glennpj_at_charter.net