Nope, that's not the issue (we know all about that one). I have existing fonts, previously copied via CIFS/SMB from 10.4 Macs to the Win server, and the Snow Leopard machine sees them as zero K. All the 10.4 Macs can access the fonts fine, as it has been for some time, resource forks are saved in a hidden file that prefixes the names with "._" This is well known for some years with Macs and SMB. But now, Snow Leopard has changed the scheme. There is no longer a separate hidden file for resource forks, unless there is an option somewhere to mimic that previous behavior. Somehow, Snow Leopard (in its default config I assume, how we received the machine) is accessing the file streams functionality of NTFS (I guess) because fonts loaded by the Snow Leopard workstation, that work fine from that one Mac only, appear on the Win server as zero K (just as they did with services for mac back in the day of using AppleTalk). It's an either/or situation (as is the earlier problem of AFP versus SMB). Fonts from the 10.6 machine are unreadable by 10.4 Macs and visa-versa. My understanding is that 10.6 has dumped AppleTalk at last (I can't see any option for it) so I wouldn't think that's an issue. However, for the rare (and getting rarer) need for backwards compatibility, the Win server does have SFM installed. I can't imagine it would interfere, but perhaps the newer mac is somehow realizing that and acting different. ??? Who freakin' knows.
I'd expect that someone here has already run up against this problem. Who out there is using Snow Leopard and storing files on a Win server? Don't tell me it "all works fine" for the rest of you. If that's the case, the source of my woes is something else. Others, please chime in.