I got banned when I wasn't even hardly online the day before?

OK,so I logged on today,or well,attempted to at least,and got greeted with that image.
The day before I basically just logged on,got my daily bonus,checked some stuff in auction,and logged on to do this PvE contest thing in my guild. After that I logged off. I didn't do anything different than usual,so if I did something bad then I would've gotten banned before. I've had past chat bans,but not one that particular day. So how did I get banned or what did I get banned for?

We do not discuss bans on the forums:
http://support.spacetimestudios.com/...e-been-banned-