I am also getting the CTDs, though for me it's only happening during battles (as stated previously). The details of the crash is a windows crash log, related to BEX (buffer overflow protection).
Every machine under my I have is running Windows 7 64bit. On some of them I have switched DEP to always on but exclude these programs, I exclude mb_warband.exe. The CTDs still continue. Just want to say this problem does not occur in native or diplomacy. May try Floris basic just to see if the CTDs continue there on these 12 machines.