Comment 4 for bug 1069578

No, the duplication only happened once, and rescanning again immediately after it happened did not produce duplicates. Nor do duplications occur now, and I can't reproduce the issue. I've tried rescanning with new music in the library and after removing music from the library, but whatever I do, no duplication occurs. It seems to have been an isolated incident.

Directly importing files that are already present in the library does produce duplicates, but I'm certain that the initial issue occurred during a rescan.

The library is located on an NTFS partition of an internal hard drive separate from the one that elementary is running on.