A couple of problems when searching the forums. Sometimes when I search it will tell me there are no results for that term ("low fat", "dog", "raw", "pancreatitis".) If I hit the search button a second time it will sometimes bring me back results, without my having altered the search term.
I understand some forums will not allow you to search terms with fewer than 4 letters, what I don't understand is why it sometimes works when you try the same thing again. 'Flood control' makes this a bit slower to do.