I upgraded today. It happens that the system is no longer usable, just freezes after one or two minutes after getting into KDE.
I supposed it could depend from upgrade of some nvidia modules, so I tried to reinstall them, but with no luck.
My system is:
Phenom x4, Asus M4A98TD USB3, Geforce ENGT 240
By the way, my monitor is a LG Flatron W2486L, but PCC still shows my previous Samsung Syncmaster. I do not think freezes are related to this, anyway which monitor should I select from PCC? I do not see in the provided list of LG monitors anything even close to mine.