I'm sure there's no problem with the XBoard interface code.lucasart wrote: I tried it and it kept crashing... There must be a problem with the Xboard interfacing code. Otherwise, I'd love to test it

Did you compile it yourself or did you use one of the precompiled binaries? Either way, did you by any chance run an SSE4 compile on a non-SSE4 CPU?
Any additional details would be useful.