Saffron - 7:21 pm on Apr 13, 2013 (gmt 0)
One thing I noticed was that the bottom ad, which is 336 x 250 was only showing one ad. I wanted it to show four. Didn't matter what I did, it would only show one ad. Then I was fiddling yesterday and removed a link unit I have & voila, four ads now showing with the bottom ad unit.
My ads performance wise are bottom, side & then top. Bottom outperforms the second in line (left) by 4 times.
I just make no money because my visitors have dropped by 30% since January. Thanks Google.