Robert_Charlton - 11:25 am on Jun 23, 2011 (gmt 0)
There's a thread from about a month ago in the Review My Site forum in Supporters... [webmasterworld.com...] which reports this message in cache, not the same as yours, but maybe similar enough that it might be helpful (assuming you have access to Supporters). The message is...
Your search - cache:WqkiCB-FYCkJ:www.example.com/
widgetsinfo - did not match any documents.
I have no idea if this is related to yours... just thought I'd pass it on.