Bug with  2 machines :
- dosdane = Athlon TBird 1.4 on ABIT KT7A-RAID + RealTek RTL8169 running Debian
Sid on 1 system disk and 4 software RAID 5 disks (md) + Samba package 3.0.6-3.
The kernel is a custom 2.6.8.1
- feuerfrei = P4 2.8C on ASUS P4P800 Deluxe running XP/SP1 + Mozilla 1.7.2
- between them = DLink DGS1008D (Gigabit switch)

My entire mozilla profile (mails, bookmarks, history ...) is stored on the Samba
server in my home directory. Home section of smb.conf on dosdane :

[homes]
   comment = Home Directories
   browseable = no
   writable = yes
   create mask = 0700
   directory mask = 0700

Symptoms : while browsing the web, mozilla often freezes. It often happens in
bookmark related actions (when deleting an old bookmark for example), but not
only. During the freeze, there is a high network activity (blinking leds on the
switch). On the Samba server, I found these lines in the logs :

log.feuerfrei :

[2004/09/03 23:33:49, 1] smbd/service.c:make_connection_snum(648)
  feuerfrei (192.168.64.4) connect to service totof initially as user totof
(uid=1000, gid=1000) (pid 8116)


log.smbd :

[2004/09/03 23:33:43, 0] lib/util_sock.c:set_socket_options(178)
  Unknown socket option O_RCVBUF
[2004/09/03 23:35:51, 0] lib/util_sock.c:set_socket_options(178)
  Unknown socket option O_RCVBUF

When feuerfrei runs Debian sid, my home directory is mounted via NFS. The same
mozilla (1.7.2) does not show the problem and runs fine. That's why I'm focusing
on Samba.

I hope this helps. And forgive my poor english, I'm french ...