Heck - I'm using MacOSX 10.1.5 to connect quite happily with 4.1.2 using both Samba and Appletalk connections - it all just works (well, sometimes there's filename munging, but that's just life with HFS+) - using apple-K in the finder, put in smb://smeservername/sharename - then fill out the three piece panel that comes up (domain, username, password) and you're done.