Sorry to hear about this bad experience - to be honest first time I hear about this was today - seem to effect very small number of people, but still - this is truly a crippling bug.
Downloading the new client won`t help here.
Does it still happen after you log out to main menu, and log back in? Is this permanent or temporary? We`ll have this fixed for the patch coming up in a couple of days. But need more feedback.
@ Mods - if you know about this please add more details, somehow I missed this one.