Lame_Wolf - 2:49 am on Dec 3, 2010 (gmt 0)
Do you see any site's icons?
Yes, but not with every site. There were 3 on that SERP page that did not. Mine was one of them.
Alternatively, if you do see others' previews, do you use "x-robots-tag" elements in .htaccess, and/or use page-based meta tags?
However, since yesterday my site is now showing them. All I have done since reporting it (here) is to clear out my cache. Can't see that being the cause of the problem though, but that's all I have done in that time.
I checked a few of the inner pages where I have adsense, and I see ugly white boxes where the adverts should be. Not nice.