problems caused by net.inet.tcp.blackhole=2

[Michal]

Hello,
maybe someone will be able to help me with the problem. Namely setting 
net.inet.tcp.blackhole=2 make samba to start very slow (90sec). Also 
smbclient is slow. After samba starts there is no delay to connect from 
the another machine with persistant local problems (smbclient). 
Additionally the sysctl setting has veird impact on mozilla: trying to 
write to web forms causes freezing of mozilla. Now setting 
net.inet.tcp.blackhole=0 reverts all the problemsr: samba starts fast 
and no problems with writing to the web forms.
my system:
FreeBSD 5.1-CURRENT #0: Thu Oct 30 17:49:13 EST 2003
ports updated 11-08-03

I appreciate any suggestions