Does it happen today or from hardware upgraded?
noticed some time after win8.1 install + hardware upgrade... not really sure if that triggered it, but my guess is that it did.
And is there any error message in Chrome Console? Press 'Control-Shift-j' to open the console and then press F5 to refresh the page.
No errors... well... only... *cough*
GET https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js net::ERR_BLOCKED_BY_CLIENT*blushes*