Just installed Ubuntu 14.10 on my server, replacing 14.04 (not upgrading it). I gave it the same name (ubuntu-server) as before. I installed Samba and redefined the shares previously established, using the same names: sde, sdf, etc.
However, I can no longer access those shares from Mac OS (Yosemite). I've rebooted the server and the Mac OS systems, to no avail. The server and the shares appear on both of the Macs, but my connection to the server is that of Guest, and although I've enabled Guest access, when I try to access one of the shares, I get a dialog "The operation can't be completed because the original item for "" can't be found". If I try to change the connection to be as a registered user, I get "There was a problem connecting to the server "". Check the server name or ip address and then try again . . .".
Does anyone know what the problem is or what I can check to get further details about what the actual problem is?