I have a Mac-mini that I just updated to Mountain Lion. After the update I have problems with Samba transfer to window 7 machines. If I start a transfer from a Windows 7 machine (I have tried three, and they have the same problem) it starts normally but after a minute or two (quite different from time to time) I get the message that the connection is broken, and if I hit "Retry" the same message pops up again. I have tried to install a clean Mountain Lion on the Mac-mini but I got the same problem. If I transfer from the Mac to Windows it works fine. Transferring files between Windows and Linux (Qnap NAS and a Raspberry Pi) works just fine. Can anyone help me with this?