Logging into LoL.com.

I have had an amazing amount of trouble logging into leagueoflegends.com through the Boards page. (boards.na.leagueoflegends.com) Probably about 90% of my login attempts have ended in an unrecognized username/password error, even though I take great care when entering my password. This only seems to happen when using Firefox (I have the latest version downloaded.) When logging in using IE, or when logging into the game client, I don't have a single issue. Didn't know if this was a known problem or not. <3