kernel 2.6.32-7 breaks monitor resolution

The kernel 2-6-32-6 works fine. After upgrading to 2.6.32-7 the monitor resolution dropped to 800 x 600 instead of 1440 x 900. I accepted this for the time being and installed the nvidia drivers. After restart I don't even get the low resolution. However now the 2.6.32-6 kernel gives the same problem!

(Is it possible to uninstall the nvidia drivers from the command line and get the normal behaviour of the 2.6.32-6 kernel back that way or do I have to reinstall the whole system and avoid using the latest kernel?)

Problem is reproducible: installing with the last *.iso gives low resolution with the AMD64 as well as with the x86 versions.

With an earlier version no problem until I try to update (403 files by now) and reboot. Then again low resolution.

An old laptop and a netbook work with the x86 so I guess it is my desktop's video card/monitor rather than the kernel. I will put the question somewhere else.