Google custom search?

As of lately I've been having "Custom search" replacing the search results of websites such as imdb or newegg. I'e tried everything and can't get rid of it. Anyone know what it is?

Ex. http://www.google.com/cse?q=the%205th%20element%20site%3Aimdb.com&cx=partner-pub-0216698762210197%3A0988242878&ie=UTF-8&sa=search#gsc.tab=0&gsc.q=the%205th%20element%20site%3Aimdb.com&gsc.page=1