I e-mailed Google support about the hybrid text ad I saw on our site yesterday and got the response this morning which said what responders to the thread had told me, that it was just a stretched out text ad. The interesting part of their response was that it may have come up due to site targetting of text ads. I checked the site targetting under advanced reports, and sure enough, we had a small number of site targetted ad impressions yesterday. Looked back at the last few months and there were a tiny sprinkling here and there. Adsense support said they could turn it off, but the number of impressions was so trivial that I'm not going to bother. Besides, I turned off the "Advertise on this site" message last month thanks to this thread:

[webmasterworld.com...]