Ciao anche io gioco ad ut, mi ha dato un errore simile al tuo:
UT2004 Build UT2004_Build_[2004-11-11_10.48]

OS: Windows XP 5.1 (Build: 2600)
CPU: AuthenticAMD Unknown processor @ 2002 MHz with 1022MB RAM
Video: RADEON 9800 PRO (6307)

General protection fault!

History: UObject::ConditionalDestroy ...