I am using fedora core 5 on a 64 bit dual core amd processor. Each of the last few builds have been locking up on me. I am not sure what is going on exactly, but am willing to help debug from this side of things if needed. The CPU of one processor pegs at a 100% and does not stop until I kill the program. After the cpu initially pegs, the program is basically locked, accepting no user input.