If it affects gameplay, it's a bug. o_o But that doesn't happen to me. So I don't know.
EDIT - Oh. I know what you're talking about. On servers with no scripted movement and just normal graal walking, you can't move when you hold control, I don't know why, but it's always been like that. Control is for emoticons, so it's probably trying to detect you using one.
__________________ BEING AWAY FROM THE FORUMS RULES