IanCP - 11:52 pm on Apr 30, 2013 (gmt 0)
we had a technical error on one of the sites that was preventing the main ad block from showing. d'oh. can't put this one on Google.
Been there, done that a long time ago, before AdSense. Actually vanished from all Search Engines.
Talk about kicking yourself to death for being too smart by half with "fancy" Server Side Includes.
Self inflicted wound, recovered in three days though.