Correct, it's the security test. Somehow it's getting to a state where it's trying to impersonate while already impersonating. This is so not what I'm interested in that I'd happily just nuke something to move past this, but I can debug if need be.

I also have that "hangs on replace" problem with the Build target in ant (but not on commandline), makes me wonder if my (WinXP) system isn't hosed somehow.