After upgrading non-essential PCs to 18.04, while keeping my primary PC on 17.10, I'm running into a minor problem with networking and Nautilus in 18.04.
When I select Other Locations in the Nautilus sidebar, I expect to see the other machines on my network plus my Windows network. They are all there on machines running 17.10, but don't appear in 18.04. Also in 18.04 although there is an icon for the Windows network, clicking on it doesn't bring up the existing Workgroups as it does in 17.10.
/etc/samba/smb.conf files are identical on all machines. I can access the shares from the 18.04 machines by running:
nautilus smb://<ip address>
in a terminal, which is why I suspect it has something to do with Nautilus rather than Samba. The Nautilus version on the 17.10 machines is 3.26.0, on the 18.04 machines is 3.26.3.