Don't know if this fits into here:

I've tried Knoppix 3.4 (ct edition) with kernel 2.6.

Everything seems fine, but fdisk shows no partions on my second Harddisk (Samsung 1204H), but the right size of it. So due to this the hard disk is not formatted.

When I boot with the default kernel, all partitions are shown the right way.

Is this a kernel bug? Or is the new kernel not compatible with my mainboard (via VT333a) and my hard disk?