Additional possible .htaccess errors.
Thanks 'ster! Yeah, I've been aware of this issue for a few days now, but haven't had time to work on it. I actually left you a board message a couple hours ago about it, trying to pass the buck to you. But I may have some time tonight to look at it.
As for my regex skills, it's pretty hard to be less advanced than me at it, but I'll do my best.