Was there some testing going on with the search this morning?
If I recall correctly I clicked "search this forum" and was taken to the bottom of the forum where there was a permanent search box.
I'm on my phone and it was early, so could have been something else. If I'm right about what I think I saw, I like it. Would just have to train myself to remember it's down there. I usually scroll through the forum page, think of something I want to search, finish scrolling, then scroll back to the top. Having a search bar at the bottom would be nice.