heres a more idiot proof regex for the steam profile field validation:
Code:
^STEAM_\d{1}:\d{1}:\d+$|^$
It ensures that there is nothing infront of steam (we had a description of the field along the lines of "Your steam id, EX: STEAM_0:1:12345", and we actually had a handful of users enter "EX: STEAM_0...", this regex will prevent it), also allows users to clear the userfield. Should also perform a bit better.