I've got something strange, I think.
I made a fresh install of SME8b7 (on VirtualBox) and made 5 user-accounts. I have tested 3 of them now and one of the User homedir's is not visible as a network-share on my Win7 laptop, but is visible on my old winXP machine.
The other 2 user accounts are visible on a Vista and a Win7 laptop. The problem is, it's my user homedir that's not visible!
I have found something about Samba and Win7, but that was about a prior SME8 beta. And one of the other user homedir's is visible on Win7. The one on which the user homedir is visible is Win7 64bits, could that be it?
Samba version is samba3x-3.5.4-0.83.el5_7.2, kernel is 2.6.18-274.17.1.el5