A little while ago I upgraded Samba from 3.14 to 4.1. I’m using Arch Linux on the client and server. This upgrade broke the ability for the client to access files containing colons, that is I could not read files with names like 2016-01-01 10:42.txt.
After upgrading my file server from Ubuntu 10.04 Lucid to Ubuntu 12.04 Precise I had a few problems with Samba. Mac OS X 10.6 clients were very very slow. A 1MB file would take several minutes to transfer completely, making browsing photos and general use impractical. Windows (Vista and 7) clients could not connect at all, the file server did not appear in the browse list and typing the name manually did not work either. Unsurprisingly, Linux Samba clients worked perfectly.