"Bring to Front" / "Send to back" functions are not working properly especially with panels (e.g: put a picture then a panel and try to bring the picture over the panel)
Moving objects with keyboard's arrows for fine positioning is not working.

Another annoying thing is that the objects are not floating, once they have been put on a layer, they remain part of this layer (e.g: put a panel and then a picture and try to move the picture)

We cannot link objects together, it may be useful for designing nice interfaces.