Not entirely certain whether this counts as a bug or a feature request, but: particularly when scanning hard drives, the 'cataloging files' step of the drive scan takes a long time and offers no onscreen feedback to show that it's working. This makes it difficult to know whether the app/process has failed or crashed, or whether it's just creating a large initial list.
It would be very helpful to show some form of progress during this step -- perhaps a 'objects added to catalog' number that could be updated every few seconds to show activity and/or an optional 'details' output (perhaps a UI accordion-like element that can be expanded) to show file-by-file or folder-by-folder progress
during the cataloging step
.
Once the catalog is built, the UI does a good job of indicating the preview-building progress, and I understand that a % complete figure isn't possible during the catalog step, but I suspect you may lose some potential users when people start a scan, and then see no obvious progress for several minutes...