Yeah, I'm getting this error as well trying to post in bugs
I have this same issue. I have been trying to post an Anivia bug in the bug forums. Nothing I try has worked. :C
Just to follow up on this, the bug report forums are fixed now. Post away!
© 2014 Riot Games, Inc. All rights reserved. Riot Games, League of Legends and PvP.net are trademarks, services marks, or registered trademarks of Riot Games, Inc.