Why would google do this on purpose, especially with Acrobat Reader? Sorry, that doesn't make sense. The only possible reason would be an attempt to get users updated for usage of video ads in the future, but sorry - that doesn't make sense either. If adsense video gets launched, and an adsense site has the option turned on, the user will get the prompt then -- and they will likely spot what it is for on the page and go ahead and update.
Google knows that prompts being thrown aren't looked upon kindly by webmasters OR surfers, especially when they don't make any sense. They would never try such a stunt. All this did was hurt adsense all around, no upside to be had.
It was a mistake. Someone screwed up. Not deliberate.
So I just have to ask, are you guys really THIS suspicious of google these days? My oh my, how attitudes have shifted...
[edited by: dkoller at 7:39 am (utc) on Aug. 17, 2006]