Sometime during booting I get info "cannot execute binary file" about different files using during boot time. Effest is that one part of the system does not 
work. It may be networ, X, usb-stick, KDM and others (theese are what I seen).
Once I tried to start network manually, using ifup eth0, but system said that one of scrips or config files using by ifup is corrupted/binary or something similar. I checked this file and it indeed looked like binary (completely messed). After rebooting the same file had proper, readable contents.
After rebooting everything is ALWAYS just fine, whith no problems at all. I have / partition in reiserfs 3.6 (default). I have new, good hard drive. I changed the old one for this problem, but it is not depend on the old drive. I did surface test on old drive, ant it is good too. 
Moreover I have 2 other installations of SuSE 10.0 on two other computers. Botho of them use reiserfs on root partitions. I have no problems with them.
This is very strange and looks like kernel/reiserfs/hardware related problem, but I may be wrong.
I'm wondering converting partition / to XFS. Is it a good idea?