I only started having this problem recently. My CTR has plummeted, and my EPC has plummeted. THe funny thing is, that right after all of that plummeted, my traffic doubled. My google ads are having the last part of the URLs cut off as they display on my page. I have them put in the Sidbare Widget place with wordpress. Can anyone make any suggestions on how I can get the adsense ads to display correctly? And how might I alter placement to up my ctr?
Have a URL or pic so we can see the problem? It does sound like a div issue from what you described above.