i have been reading about the images for ad sense tweak, but does google has a clear stament for that? and does just put some border or a line, avoid that?
I was using one pic with a 2px border next to a 234x60 ad for a few months, but now I'm using 4 pics and a 336x280 ad, so I put a vertical line between and I emailed Google. I have yet to hear from them.