Problem with commas and umlauts in song titles

#1

I noticed that after syncing songs with said kind of titles, umlauts are left out in titles on the BB display, but that’s not as bad as the other phenomenon:
If there is a comma in the song title, it is truncated up until before that comma and on firing up the BB Manager, the song has disappeared entirely.

#2

This is a known issue. Always try to use only alpha-numerical symbols and spaces for song titles.