Sorry for being unclear. My Nexus 7 seems to be throwing an error when I try to connect to websites (some work, but I believe that they are cached), saying "can't connect to the proxy server", however, I never actually did anything remotely in that direction. I mean, I had it connect to my home wifi network. I never installed a proxy manager app of any sort.
Also, it came running 4.1, if that helps.