If I select any image from library grid view, any operation always applies to the first image, be that setting flags, ratings or anything. Also selecting an image and switching to develop opens the first image and not the selected image. Selecting from film strip works, but grid view works like the selection is always just the first image, regardless of what is actually selected. The selection is shown correctly, but all operations are applied to wrong image. Also auto advance always advances to the second image and not the next to the selected one.
Needless to say this has worked fine with all earlier LR versions since 3.0...