I am not a Css expert , but i am getting sometimes an error .. i dont really know why .. last error was i had to many divs called "# banner ", once i changed the banner word was fine..

Anybody got some funny errors like this?

nope, but then I've not used Adblock Plus.

And what does this have to do with adblock?

If you have more than one element called #banner, it's too many, but it is nothing to do with adBlock