If you use Google's CDN you might have issues today. OpenDNS has blocked them as a phishing site. Looks like it is the result of an issue with the ssl cert.
This is going to affect a lot of people today. http://bit.ly/wEzsND
Workaround (with a bit of futureproofing) here: http://geekyscribbles.com/2012/01/google-cdn-gets-blocked-and-how-to-fix-the-problem/