I just tried disabling all my APE extensions but I can still crash Xee using the same steps. Though, the crash log is much shorter:
Command: Xee
Path: /Applications/Xee.app/Contents/MacOS/Xee
Parent: WindowServer [60]
Version: ??? (2.0 beta 2)
PID: 3776
Thread: Unknown
Link (dyld) error:
image not found