martinibuster - 8:02 pm on Feb 14, 2013 (gmt 0)

I see them on the 350 x 250 ad unit. There is a box situated to the right of a text ad, with a stocky arrow pointing left to the ad. One boxy arrow per ad, so it forms a column of boxy arrows. I created a channel to measure the CTR and earnings for comparison.

Anyone else measuring performance of ad units with visible boxy arrows?