error message

Yes, you know what I'm talking about. And if not, how!? It's been lingering for over 3 weeks now. It is a problem which occurs not all the time but every now and then and leads to double posts and stuff like that. As a mod, I'm tired of deleting people's double and in some cases, triple...

Every time I try opening a page on the main site, whether it's the main page, a linked name, a link to something on the main site, etc. I get the following message: :confused: :wtf: :helpme: