samba 3 on CURRENT and net.inet.tcp.blackhole

[Michal]

"net.inet.tcp.blackhole changes the behaviour of refused incoming  TCP 
connections and it doesn't seem possible it's the cause this problem.
I'd sugest increasing the log level in smb.conf."

Thanks for suggestion about logging. I know what net.inet.tcp.blackhole 
seting is for (and I would like to continue to use it). And this is why 
I do not understand what is wrong. I have run smbd -D -d10 and checked 
log.smbd but I could not find anything informative.

Michal