Version: svn rev. 868636 (using KDE 4.1.2)
Installed from: SuSE RPMs
My music is on an external harddisk, which is attached to the computer but not mounted when amarok is restored as part of the kde4 session. In that case the meta-data from the playlist is not shown anymore and the collection is removed, i.e. only shows: One entry with "unknown" itmes for artist, album and song.
Mounting the harddisk does not help, i.e. it would make sense if the music files were not shown as part of the collection until they are available, but even if they are available and I restart amarok, the collection is still empty.
the collection folder in amarok is still set, yet not updated if the harddisk is mounted.
*** This bug has been marked as a duplicate of bug 171213 ***