I searched for C# Interfaces and didn't find what I was looking for in the first page of results.  When I click "older" to get more results, the search term listed in the search box changes to "c". This URL demonstrates the issue. 

http://channel9.msdn.com/Search?term=c#%20interface&type=Shows&page=2

As you can see, the search terms are in the URL but when I go to this link, the search term listed becomes "c" instead.