X snapshot at start of X

[harsha <harshu@hd2.vsnl.net.in>]

hi,
   I have noticed this wierd thing happening. I am using KDE 2.0 This is what is happening.

I start a X session as user foo. 
I start another Xsession as user foobar. 

While starting the Xession as foobar. I get a snapshot of the full screen of session of foo. That display lasts about a sec or less, but just enough to see the what is going on. 

This even happens even if i start as foo and exit and then start the session as foobar. 

I am using Riva TNT2 Ultra card with the drivers from nvidia site. I heard that the nvidia drivers are unstable.

I was wondering if it was not the fault of the driver but something else is going wrong.

can some shed some light on this.

regards
harsha