[PRV]

Thanks, Joel, but it's not as simple as it may appear on surface. The whole idea of shared layers is that you can have multiple shared layers on one canvas. Whereas in 4, you can only have one master to a canvas. So when I open the file in 4, there's no data loss, but I have to create new masters to reflect the combination of shared layers that I had in my 5.x file. This itself is a bit of a pain, because for some reason I couldn't just drag and drop layers between master canvases, and couldn't even add a new layer to an existing master, so I have to create a new master and then copy-paste objects from the masters created from shared layers. Then I have to go in and apply these newly created combination masters to my canvases.
And as if this isn't painful enough, I'm getting an Alert on almost every action (applying a canvas, switching canvases, etc): the Alert says something like *** -[NSFlippableView delegate]: unrecognized selector sent to instance 0x178778c0.

I understand that you have to give up backward compatibility at some point, so I'm not sure that I'm expecting any fixes, but just wanted to point out that it's not as simple as you describe it

Thanks,
--pv