In a previous blog post I talked about what you can do to get DNN 7.1 working if you previously had Xepient's Open Search installed. One thing I failed to cover though, was what happens after you disable open search? You likely no longer have the DNN Search Results module on a page, and after upgrading to DNN 7.1.2 (I didn't notice this in 7.1.0) you may find that the "Preview" search results in the Search SkinObject no longer work.

You may not actually notice, but if you try to "search" and you just get redirected back to the page you were on when you searched, you likely are running into the problem I have a fix for below.