I've only seen this in Firefox and Chrome. So far, it doesn't apply to IE
The arrow buttons are huge. I've already seen the 90x90 button size, and they are bad enough, but 336 wide !?!?
Talk about desparation on Google's behalf. No wonder CTR is down. They ruin any site.
And, you get a white band along the bottom of the advert. Okay if your site has a white background, but on anything else, it looks horrid.
I hope someone from Google is reading this and will do something about it, PLEASE.