thatjen - 9:43 am on Jul 3, 2011 (gmt 0)
I don't know the exact date but my CTR dropped about a half percent or more around the last week of June. It coincided with when I first noticed the change in the 336 units. All of my 336 units, across a few sites, dropped in CTR, and my wide skyscraper dropped too - the font size in that one got bigger and the text got all jumbled. I had the font set to large, and tried default and medium and it looked the same, so I changed it to small to avoid the jumbled look. I experimented with the font color a tiny bit with the 336 unit and probably will some more. Overall I'm soo sad because things keep getting worse and worse for me, even though my traffic (mostly search engine traffic) is the same as always, or better.