ok, now i see the problem. This could be a bug, perhaps in SME or perhaps in Samba.
Or even perhaps in your Windows box - is it on XP and up to date?
I have used multiple SMEservers, and have not seen this problem, but I do not have anything at the moment I can really check on.
Suggest you document it in the bug tracker, so that people more skilled than me can help you out.