Bugs with Nvidia drivers

Hi list, I have a Suse 7.1, upgraded with suse kernel 2.4.7 and the latest nvidia drivers. I am using kde 2.2.0 and XFree 4.1.0, from suse's rpms. I had a big number of "CapitaLised" files, so I run the following command: for i in * ; do [ -f $i ] && mv -i $i 'echo $i | tr '[A-Z]' '[a-z]' ' ; done ; It works with all my machines, but if I do that on my machine with nvidia card X and Kde 2.2 just freeze. I have to login to my machine from my network to kill the X server or reboot the machine itself, to have my machine back running. Praise