I just set up a new server for home use running Ubuntu 11.10. Installed the regular samba pkg and added a share through webmin. Seemed to work fine until i started transferring large quantities of data. It just suddenly stops without any error message (Win 7 x64 client). Already transferred files stay on share but not everything makes it through. Browsing and deleting works right after the failure without reconnecting.
The only thing i can find in the logs is the following (log.smbd)
[2012/01/21 22:48:20.224151, 1] smbd/server.c:282(remove_child_pid) Could not find child 3184 -- ignoring
But i don't know where else to look except for dmesg and /var/log/samba.