Maximum zoom in level : crazy midi editing behaviour

When you edit midi items at maximum vertical zoom in level, some strange things happen :

- Create a track and insert an empty midi item.
- With snapping enabled, put the cursor at the beginning of the second beat, expand the track to its maximum height and set the vertical zoom in to maximum.
- Enter the midi editor (inline or main editor) and draw a note that occupies the whole second beat. Set the vertical zoom in to maximum (the cursor should be at the beginning of the second beat as in the arrange view).
- Now disable the snapping and move the edge of the note just a little.
- Get out of the midi editor and VOILÁ!, the change you just made is undone. The edge of the note has returned to the beginning of the beat.

This is easily reproducible. In a complex project, I´ve seen even more bizarre things happening – like both edges of a note changing their position, for example -.