Here’s an observation I made working with tropy through the last months:
when selecting an item / several items, and then wanting to zoom in or out, still in the project view, the view always goes back to the first items in the list. It would be prefable however to keep the object(s) in view when zooming (as is for example the case within finder/preview in mac os x). I don’t know if there would be any disadvantage with this, I can’t think of any, but it would perhaps be good to hear the opinion of other users on this.