"Find in files" says : "No files were found to look in.Find was stopped"
On some occasions, "Find in files" will just dump this message: "No files were found to look in.Find was stopped", and will not even try searching. This same thing happens often in VS2003. Interesting enough, the first FindInFiles I started after I installed VS2005beta1, it immediatelly happened.
The workaround for that, in VS2003, is, when it happens, to press Ctrl+Break (I usually press it a few times, just to be sure, because you don’t see any feedback) and then try again. It always helps. Strange enough, that _same_ workaround does work in VS2005 as well!