F3 has been working normally for me, until today when I dragged a code tab onto a second screen to do some side-by-side editing.
When I press F3 in the original IDE window, it appears OK.
However, if I press F3 in any tab of the second window (on the second screen), it doesn't appear. I don't think it's hidden offscreen either, because doing the Alt-space "window rescue" move doesn't work either.
Only a minor annoyance, because I can open it from the first window and drag it across.