Doh! Had this come up a couple of years ago, when I had versions 10.1 through 10.6 server... and a few more macs. All I have is 10.5 at home and 10.7 at work. I may have one last copy 10.2 server kicking around still, you can have it if I find it, don't think I have anything it runs on now. But generally if the consumer OS supported it, the server OS would too. only odd duck I've seen thus far is 10.5, Maybe because they left Appletalk in there for the printserver, some bits of file sharing were left too?

One thing I didn't try is the reverse, 10.5 server back to the PB180. I'll have to test that one before the PB is gone too.