Lame_Wolf - 9:19 pm on Sep 22, 2010 (gmt 0)
I noticed this on quite a few of my sites about 3 weeks ago. Not sure if it was that way for awhile.
As an IE6 user, I have seen similar errors for a long time, but I do not think they are the same problem for two reasons:
1: Some of the pages never had adverts on them.
2: No matter how many times you pressed F5, the error would still appear.
I have a custom 404 page, but this page is not shown with this latest error.
I actually had to go into the site and change the ads I was showing and change a little code to make them work again.
It is against the TOS to alter the code. You are only allowed to alter it for validating the page. Nothing else.