OSX keeps redirecting to OpenDNS pages

I have Roadrunner through Bright House Networks, and every now and then, my Macbook won't be able to load a webpage (completely random, both the time and the page itself).

I thought this was just an issue with Bright House's DNS servers, so I set up OpenDNS. The issues persist.

This also seems to be happening on another MBP in the house.
When I boot into Windows via Boot Camp, everything works just fine.

Ideas?