smakersI highly doubt this has anything to do with ESEA itself. This is most likely a browser hijacker on your computer.
Run TDSSKILLER. Google it if you don't know where to find it. Then run Combofix.
"HiJackThis" is another good tool, but that one isn't very user friendly and has the potential to blow up windows if you do something wrong, so take caution. I'd start with the first two.
I just find it coincidental that Crooked_ had the same thing happen.