Freenas has been working for me with pretty much out of the box settings for a few years now. Over the weekend I did the upgrade fron 9.2.1.2 to 9.2.1.7 and it didn't go well. All 3 other computers in my little home network (mine, wife's & HTPC) lost contact with the CIFS shares. Not being a software kinda guy I was a bit leery about poking around too much but I did a few minor thing like change the ACL from windows to Unix and back, set the permissions recursively, rebuilt the network...
Shares not accessible
Shares not accessible