Comment 45 for bug 44874

If worked here - at least for now (I restarted the system a few times without problems).

In my opinion, this work-around also points to a timing issue between starting the ethernet network, starting the samba system and mouting the network shares.

Most of most of the above mentioned suggestions influence the point in time when a specific service is started:

putting smbfs in /etc/modules: early in the boot process

mounting shares in /etc/rc.local: late in the boot process

pre-up sleep 5 in /etc/network/interfaces: give something else more time to finish

This would also be consistent with my observation that the /etc/modules variant sometimes work and sometimes it doesn't.

My guess: This problem is a hick-up in the multi-threaed booting process introduced sometime during the latest Dapper pre-releases.