I also get this error. The message appeared today for the first time. It appears on the frontpage of the forum and the message re-appears circa every 10 seconds. And the error message can be produced if I try to click on the shoutbox or load the archive of the shoutbox.
Oh, and I use the Internet Explorer.
Edit: "every 10 seconds" was wrong. <_<
The message pops up every 3-5 seconds. Absolutely annoying...
