X unstable after upgrade (under 6.2.2-3)

[David Baron <d_baron@012.net.il>]

I have seen numerous complains already. KDE 1.3.5 should not be soooo much 
more unstable than 1.3.4. Netbeans (Java IDE) is also problematic. Various 
programs simple throw the session out. I get the login screen.

How to fix?