I'll download the map and put it through a quick stress test shortly, I don't have a linux server, so it's likely that I won't be much help.
It's a long shot, but does ALT+P Return any type of errors, such as incorrect I/O etc etc.
I'll Post/Edit this shortly.
EDIT:
Couldn't get it to crash in TF2 after 30 mins of testing, crashes Crafty without any effort though.
Was the map PakRatted on a 64 bit system, and like I said above, were there any I/O errors?