A new WebmasterWorld thread brings up an old issue with Google's AdSense ads rendering on the Google Cache results. Some ads, depending on the site's layout and html, won't render properly. Let me quote the complaint in the new thread:
When showing the cache of URLs of a site I see something strange. A lot of public service ads or no ads at all as well as ads not related to the content appear. Using the adsense preview tool everything looks fine.
I have checked the cache of a different site in the same niche, it has 100% better CTR and the ads in the cached version look completely on topic without any PSAs.
I posted about a year ago about the ads in cache displaying improperly most of the time, not always but frequently, and Google acknowledged there was a problem, it was escalated, and we never heard about it again.
Another problem I raised was whether we got credits for ads on those cache pages because I use allowed sites and there was possible an issue there too, no resolution has been heard on that topic either.
We've been abandoned.
Did Google abandon us?
Forum discussion at WebmasterWorld.