Lukasz Czekierda found out that running curl with a literal IPv6 address doesn't seem to work with curl 7.9.8:
$ curl http://\[3ffe:8010:57:60::2]
Logged In: YES user_id=1110
Fixed in CVS, thanks for reporting!
Logged In: YES
user_id=1110
Fixed in CVS, thanks for reporting!