Hi all, This is my first mail to the mailing list. I'm currently facing a problem on our samba installation, since the package upgrade from last week (friday) the samba configuration has been replaced with a news one. I had to put a backup in place. But now there areaccess problem, on some clients but not all. Linux is not impacted. Only Windows 7 clients are impacted, but only clients which knew the Samba server before the configuration change. Let me explain, there are computers which kenw the server before the problem occurs and one which just received at the office that know the samba server only after the problem. Computers which knew the Samba server: Each time we try to open an MS Office 2010 file, this one is already accessed or read only. It takes a long time to tryu to open it. New computer: This one can access the file, edit them and save them. But it takes a long time, sometime 1 minute to open it or save it. I don't understand why the different clients have different symptoms, one can access files others can't. I suspect an SMB cache on clients, is that true ? If it exists, is it possible to purge it ? I've played with the oplocks with no luck. I tried to create another SMB share it worked well on the new computer but it takes a long time to open new documents. The samba server is accessible on a Bonded network interface. What am I missing ? I don't understand what goes wrong ... seems the oplong are for something. Thank you for your time. Samba Configuration file: [global] workgroup = WORKGROUP netbios name = NAS server string = NAS security = share interfaces = bond0:0 browse list = yes browseable = yes guest ok = yes guest account = nobody browse list = yes public = yes wins support = yes socket options = TCP_NODELAY IPTOS_LOWDELAY SO_KEEPALIVE SO_RCVBUF=8192 SO_SNDBUF=8192 load printers = yes printcap name = cups disable spoolss = Yes show add printer wizard = No printing = cups [NAS] comment = NAS path = /nas/data/samba force user = nobody force group = nogroup guest ok = Yes writable = Yes guest ok = yes Informations: OS: Debian Squeeze 6.0 Samba: 3.5.6 Clients: Ubuntu Linux, Windows 7 Software: MS Office 2010