I have been using MB2 for a long time and just now found the time to convert over to MB3. With just over 1500 movies, it was not a task I was looking for too...but I must say the conversion was painless.
Along with this, I have decided to take the time to update all the artwork, covers, etc. for all my media (was still using stark covers). I have reverted all my covers back to original .jpg's and now use CoverArt for everything. In particular, for Collections (and boxsets) I use the "fan" treatment.
One question I have is: What is the difference between a collection and boxset?
The issue I am having is with "nested collections". What I mean by this is have a few collections that I have nested inside collections. For example, I have a Batman Collection (with a collection.xml and accompanying folder.jpg and backdrop.jpg). Inside that I have Batman Anthology Collection and The Dark Knight Collection (each with corresponding xml's, jpg's, etc.). Then inside those I have the actual movie folders.
The issue is that CoverArt dresses the Batman Anthology and Dark Knight Collections correctly (as a fan)...but the parent Collection (Batman Collection) gets a clearcase treatment (with the blu-ray spine). I do not have that treatment selected anywhere in the CoverArt settings.
My guess is that it does not recognize the nested folders correctly...but maybe there is a setting somewhere that I am missing?
Here's what the folder structure looks like. The "Batman Collection" level does not get the "fan" treatment...the ones below that do.