Comment 6 for bug 157777

I had the same problem and think it has something to do with the sata-modules of the kernel. I've switched to the 2.6.23.1 vanilla kernel after this bug destroyed parts of my filesystem. So please fix that, I guess people won't be happy if they find out that a buggy kernel messed up firefox and when they try to reinstall it they find out /etc/apt was deleted and some of their documents were killed too - these are just some of the things that happened here. And yeah, I'm indeed not very happy about that :/.
It works perfectly with vanilla kernel 2.6.23.1, no lockups, no filesystem errors. Tried switching to nv-driver and such stuff before but it didn't help anything. I'm using the proprietary nvidia-driver without any problems now. It looks a bit like noone ever tried gutsy out on a 64 bit system before releasing it - I just hope that this will change soon or I'm forced to switch to another distribution.

My hardware:
Athlon 64 3500+ (Single Core)
2 GiB RAM
nVidia 8600 GT (PCIe)
2 SATA Harddisks (Connected to ports of nForce 550 chipset)