I'm getting the exact same thing for months now and it is really getting annoying. Only seems to happen when I used an iPhone or iPad. Constantly happens to me. I finally after trying to investigate it myself as a possible XSS attack, gave up and noticed the Technical Queries section of the forums. Any progress on this?
It happens for me not only on Bluemoon but I've noticed it on Redcafe also when I visit the scum site to cheer me up when I'm down (as they reluctantly continually praise our side!!!)