I had to reinstall my opensuse 11.3 completly after attempting to install cuda 4. Somehow, while uninstalling of the old cuda version, the script emptied /usr/bin and some other critical directories resulting in an unusable system. I had to reinstall using a boot cd.
For your information :
OS: OpenSuse 11.3
Old Cuda : from j.eng (mendoza additionnal repository) (I don’t remember the old version exactly and since I reinstall I cannot tell)
The cuda that broke my system : cudatoolkit_4.0.11_linux_64_suse11.2.run
I hope this will help