On my site my 3 and 4 ad large banner ads are today showing ads stacked vertically instead of three next to each together! Another site (forum I'm a member of) I've just used today, and there ads are stacked vertically too. Except theirs is worse as the ads all overlap each other so you can't read them! WHat's going on? Anyone else got this?
It seems that performance of banner ads is better compared to text ads, so Google is serving banners more now