To illustrate why I am baffled, I just now repeated exactly what I did an hour ago--i.e. I typed "WTO" into the forum search [filter] box and selected 1 year and hit "search, and, voila!, there was the thread I was looking for. Why did it work just now but not an hour ago?

Genie

P.S., My efforts an hour ago consisted or re-trying the same thing several times, trying a lot of different combinations of words, etc., just to make sure there wasn't some small variation in phrasing or spelling that was responsible. Nothing worked at that time.