Unable to log into AD account twice?

Ok, so I'm testing 10.5.2 client here. This is specifically on a MacBook Pro, but the hardware shouldn't matter, right? Anyway, I can bind fine to AD and OD, verify access to the domain with "id", and log into my domain account...once. If I log out, I can never log into that account again. I can't find any obvious errors in the logs, and any other domain account can log in...once. I wiped the entire system and re-installed to see if it was a bad install (it's a test machine right now), same thing. Couple of notes: Unit has Parallels and Boot Camp set up (but not active when testing) If I log in as a local admin when the domain account doesn't work, the account is listed in LDAP, the home folder exists, and "id" still returns valid information, so the unit is still on the domain. I am tied to a local timeserver, so Kerberos time-differential is not an issue. And finally, I'm still learning this cylinder/triangle/pyramid of death config, so be specific if you have suggestions. Thanks!