[Samba] WinXP not print - Samba3.6.6

[Thiago Parolin]

Hi,
After upgrading samba from 3.5 to 3.6, WinXP can not print, and the samba
log shows:

[2013/07/24 17:40:00.377907, 0]
rpc_server/spoolss/srv_spoolss_nt.c:1748(_spoolss_OpenPrinterEx)
  _spoolss_OpenPrinterEx: Cannot open a printer handle for printer \\spsi

All other systems are ok. (until now)
Any hint to fix this?