I use Samba 3.0.7-1 (deb binary packages downloaded from Samba site) on Debian Woody. I use it in local workgroup. Previously I used version 2.2.9 on same machine. testparm shows that config file is OK. After upgrade (with all neccessary packages) Samba to 3.0.7 server stopped respondind on net bios name. Everything works normally when accessing server using IP, but using net bios name cannot be resolved. nmbd is running properly. It sometimes becames local master browser, all other names (tested using nmblookup from that server and other local machines) can be resolved properly, except this server.
I use Samba on network alias interface. I wanted it to be available only on that interface, so it wos configured by this: interfaces = 192.168.0.50 127.0.0.1 bind interfaces only = Yes socket address = 192.168.0.50 when i deleted last line (socket interfaces) everything started working normally.
side effect of the socket address param. Not changing this unless we get more pressure.