I got an email from Adsense today (from adsense-noreply@google.com) that starts off, in big print:
180 failed AdSense crawls detected
and suggests what I should do to fix it. But my Status > Crawler Errors page lists no errors, nor has it in the past, I know because I check this occasionally.
Is this something I should be worried about? Has anybody else gotten an email like this?