When you click on the seekbar, it seems to skip forwards or backwards through the movie, in steps of one tenth of the movie towards (or beyond) the cursor, at least on Windows.
Here's what I mean:
This is pretty inconvenient, why not instead simply jump to the exact mouse pointer position, whenever you click somewhere on the seekbar.
(I know you can also drag the seek bar indicator, but simply clicking where you want to jump to is easier).
Same for the fullscreen progress bar (which I didn't know about until reading that post).. please make it clickable.