I've watched SMB fail in so many different ways, first on Tiger then much worse on Leopard. Visit the Mac forums and you'll see hundreds of messages along the same lines - the SMB/Finder combo is broken and Apple doesn't seem to give a damn about fixing it. It's no good saying change your /etc/smb.conf when Finder is gumming the works. Shares should auomtaically appear in Finder and thej don't. If you have 2 similar systems, say desktop and laptop, with similar accounts and files try moving files on one machine via symlink and watch OS X move the files on your desktop machine instead. OK, change your /etc/smb.conf again and it can (maybe) be fixed but ... you get my drift. I have had files appear in remote shares and I copy them to my desktop machine only to find they were never copied, and that's after waiting for the progress bar to complete. With Finder/SMB you solve one problem and it either reappears next time or another one takes its place. To me this is THE issue stopping me from recommending OS X in mixed network environments. With Snow Leopard Apple seems to have surpassed itself with new Finder/SMB problems. I didn't think there were any more to add to the long list of unresolved bugs.