KDE 4.8.5: random "hangs" on login
I just tried out (stock) KDE 4.8.5, and I have some stability problems with it. On every second login, the KDE splash screen shows the first two (blurry) icons, and then stops there. When I kill it using Crtl+Alt+F6, the attempt just after it goes right, and KDE starts. On the next login though, the problem will show up again.
I have an NVidia GT210 card and I use the recommended proprietary driver from NVidia and a TwinView monitor setup. Xfce is running very nice with this card, with full Compiz effects and all.
Any clues as to what might happen here?