[rwstout]

1. I imported PDF-1 into library on device 1.
   
2. I synced device 1 up to Dropbox.
   
3. I synced down to device 2.
   
4. I annotated PDF-1 on device 2.
   
5. I swapped PDF-1 for PDF-2 on device 1. (in library: longpress on PDF-1, menu, swap).
   
6. I synced device 1 up to Dropbox.
   
7. I synced down to device 2.
   
8. I lost annotations on device 2
   
   
9. All syncs: sync annotations=off.