samba - Jul 2004 - Samba 3.0 / Cups - Shared Printers vanishing

Hi!

I am using Samba 3.0.4 + CUPS as a print server for a lot of windows
machines. Since some days, all shared printers are gone every morning.

Printers are still accessible in CUPS, but if you open a windows
explorer and view the shares of the print server... there's nothing.
Printing also does not work.

Restarting samba & winbind solves the problem until the next morning.

Does anybody know this problem?

Greetings,
Rainer