You attempted to reach www.facebook.com, but instead you actually reached a server identifying itself as *.ak.fbcdn.net. This may be caused by a misconfiguration on the server or by something more serious. An attacker on your network could be trying to get you to visit a fake (and potentially harmful) version of www.facebook.com.
You should not proceed, especially if you have never seen this warning before for this site.
I've done google searches and all I've found is a site called Akamai which provides server services for many websites. It seems my laptop (and those of other users) don't recognize their security credentials so this warning pops up. Some sites claim it's legit; others have doubts.
Has anyone had this warning before with any other site? Would you proceed?
I also do DNS flushing and that works temporarily. I should also mention that it only happens at my apartment. When I'm back home or in campus I have never received this warning.
Maybe it's a problem with the router?