There's a rogue bot being run from there (and possibly other IP addresses in the same subnet) that's ignoring the rules. It claims to be "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; (R1 1.1); .NET CLR 1.1.4322)", but *real* web browsers also send user-agents for inline images.
The cheeky git chewed through a good 80MB of my bandwidth yesterday (running what looks like multithreaded and with no rate limiting), hence why I've noticed it.