downloader task NullPointerExeption

Line

     1 I/Util ( 176): Copied /sdcard/subsonic/music/Unknown artist/Unknown album/00-Unknown title.mp3.0.partial to /sdcard/subsonic/music/Unknown artist/Unknown album/00-Unknown title.mp3
     2 W/AudioFlinger( 31): write blocked for 83 msecs
     3 E/Database( 130): Error inserting is_music=1 artist_id=3 mime_type=audio/mpeg _display_name=00-Unknown title.mp3 title=Unknown title title_key _data=/sdcard/subsonic/music/Unknown artist/Unknown album/00-Unknown title.mp3 album_id=3 track=0 year=0 date_added=1291234809
     4 E/Database( 130): android.database.sqlite.SQLiteConstraintException: error code 19: constraint failed
     5 E/Database( 130): at android.database.sqlite.SQLiteStatement.native_execute(Native Method)
     6 E/Database( 130): at android.database.sqlite.SQLiteStatement.execute(SQLiteStatement.java:66)
     7 E/Database( 130): at android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1313)
     8 E/Database( 130): at android.database.sqlite.SQLiteDatabase.insert(SQLiteDatabase.java:1173)
     9 E/Database( 130): at com.android.providers.media.MediaProvider.insertInternal(MediaProvider.java:1310)
    10 E/Database( 130): at com.android.providers.media.MediaProvider.insert(MediaProvider.java:1193)
    11 E/Database( 130): at android.content.ContentProvider$Transport.insert(ContentProvider.java:140)
    12 E/Database( 130): at android.content.ContentProviderNative.onTransact(ContentProviderNative.java:125)
    13 E/Database( 130): at android.os.Binder.execTransact(Binder.java:287)
    14 E/Database( 130): at dalvik.system.NativeStart.run(Native Method)
    15 W/AudioFlinger( 31): write blocked for 106 msecs
    16 I/Util ( 176): Deleted file /sdcard/subsonic/music/Unknown artist/Unknown album/00-Unknown title.mp3
    17 W/DownloadFile( 176): Failed to download 'Unknown title'.
    18 W/DownloadFile( 176): java.lang.NullPointerException
    19 W/DownloadFile( 176): at android.content.ContentResolver.acquireProvider(ContentResolver.java:574)
    20 W/DownloadFile( 176): at android.content.ContentResolver.query(ContentResolver.java:147)
    21 W/DownloadFile( 176): at net.sourceforge.subsonic.androidapp.service.MediaStoreService.saveInMediaStore(MediaStoreService.java:71)
    22 W/DownloadFile( 176): at net.sourceforge.subsonic.androidapp.service.DownloadFile$DownloadTask.execute(DownloadFile.java:226)
    23 W/DownloadFile( 176): at net.sourceforge.subsonic.androidapp.util.CancellableTask$1.run(CancellableTask.java:74)
    24 D/CancellableTask( 176): Stopping thread for DownloadTask (Unknown title)

Line 3 has some unprintable characters in it. Python string repr:

'E/Database( 130): Error inserting is_music=1 artist_id=3 mime_type=audio/mpeg _display_name=00-Unknown title.mp3 title=Unknown title title_key=\x08\x1dQ\x08\x1dC\x08\x1d=\x08\x1dC\x08\x1dE\x08\x1dU\x08\x1dC\x08\x1d\x06\x08\x1dO\x08\x1d9\x08\x1dO\x08\x1d?\x08\x1d1\x08\x1d _data=/sdcard/subsonic/music/Unknown artist/Unknown album/00-Unknown title.mp3 album_id=3 track=0 year=0 date_added=1291235336'

Line 18 may be caused by line 3.