When trimming the end of a clip that is followed by filler, and using the '>' key to move the trim point, the selection is deselected after the first click. Trimming the front of a clip preceded by filler doesn't show this behaviour.
When two clips are selcted on different tracks, video or audio, the clip that is followed by filler is deselcted but the one preceded by filler continues to trim which is very frustrating!