Running Xubuntu 13.04 development release. I'm starting a new thread on this as some of the old info regarding this problem appears to be outdated. I'm in Thunar, which is finally able to browse network shares without any extra tweaking (installing other packages, etc.). I have been able to browse network shares just fine until this morning. Earlier this morning I could see the computers but every time I clicked on one, I got the error "Failed to retrieve share list from server: connection timed out." Rebooting hasn't helped. In fact now that I've rebooted, I click "Browse Network" then click on Workgroup and get the same error. I CAN browse shares on this same computer from another computer without any problems. I can also go to a command line and enter "thunar smb://192.168.1.9" and it will browse the shared folders on that computer just fine.
Maybe this is a regression? Should I file a bug report? It has been working just fine for the past several days until now.