Comment 9 for bug 1294303

"That log file indicates that you might be missing some codecs, because some of your mp3 files fail on indexing. You might want to install gstreamer1.0 plugin packages "bad" and/or "ugly"."

I have those packages installed since always.

"Mediascanner must scan the files or they can't be queried by the music scope or the music player app."

Since I never truly used Music Scope, (not even believe it to be useful for me) uninstall Mediascanner was a better solution - of course in my case.

"Mediascanner remembers what files you had on the volume and the next time you plug it in it only scans what has changed."

Actually Mediascanner never properly scanned my internal hard drive (before uninstalling, of course), so Music Scope showed only a few files from my collection.