Samba 3.0.0 can't solved old Samba 2.2.x folder-names with German "Umlauten" like ä,ö or ü , and the same is with @
Do you have any codepage/charset settings in your smb.conf file? You may need to set 'unix charset = ISO8859-15' or something similar.
Thank you for solveing my Problem Mathias Fechner
sorry for the same, cleaning up the database to prevent unecessary reopens of bugs.
database cleanup