No printscreen,no icons working for KDE 4.2

[Guest]

Hello I've just installed KDE 4.2 and I have a couple of issues.

First of all printscreen refuses to work.Don't know why.I can only take screenshots using Ksnapshot.

Second a lot of system icons don't appear.Instead I see a couple question marks.My dekstop looks like this:

[img width=400 height=250]http://i123.photobucket.com/albums/o302/steliosthesmart/problem.png[/img]

I'm running Kubuntu 8.10 and it's a fresh install I've also installed Nvidia drivers 177 version.

My system has

-AMD 64 Athlon
-Nvidia Geforce 7950GT

Any clues anyone?