Is this just my setup or a bug?
I cannot repeat any of your problem here. It seems like your display driver is playing up.
I think I'd like some info on the new search button. When I click on the blue binoculars I can find Folders that have info but I can't work out how to use the Search in Photos option because nothing seems to happen. Is this different from the thumbnail right click search?
Yes, it is different; it is not for IPTC data which is only for jpegs. The new QU data base feature is for folders and all types of images.
To the left of the blue binoculars there are 2 boxes: D is for folder Description tag words and C is for Creator.
On each thumb, bottom left, there is an"i", click that for adding image tag words.
Terry