Ok, this is really starting to do my head in now. I have no idea whether the problem I'm experiencing is due to the recent upgrade to the Nvidia drivers or what!
I've seen a few threads kicking about relating to the KDE desktop freezing up, but unfortunatley there doesn't appear to be any solutions anywhere, either on the nvidia site or even doing a quick google!
Basically, the situation I have is that I've installed the lastest upgrade to the nvidia drivers (following some links from other threads on this site). I ran 3Ddiag and got no errors at all, everything appears to be working well in that area.
I've checked my XF86Config file to ensure that 'nv' has been changed to 'nvidia', as per some other threads, but still no joy.
I'm running a GeForce 400MX (64MB), if I remember correctly, I'm actually posting this from work.
I can supply some further information later if anyone thinks they may be able to help point me in the right direction.
Thanks for your attention