[Samba] Sudden disconnect

[Tamir Halperin]

hi all, just finished upgrading to 2.2.8a and things went well and without any sign of a glitch. I was able to log in from windows to my FreeBSD box as root just like before the upgrade. 
but then, all of a sudden, the box was no longer available from windows 
no sign of anything going on with the FreeBSD computer 
I can putty into it and it seems fine 
nmbd and smbd show up in top 
what could have changed suddenly 
any thoughts? 

Tamir