Comment 47 for bug 275451

I experienced the problem after cloning a system: With the 1st system, everything works fine. After creating an identical clone the network mounts were missing. The good news is that after quite some hours of searching I could track down and resolve the problem. The basic cause is that the clone's NIC obivously has a different MAC address. This created a new entry eth1 in /etc/udev/rules.d/70-persistent-net.rules. In /etc/network/interfaces only eth0 was listed which still used the old MAC. As a consequence the NetworkManager created an entry for eth1 but this obviously starts too late during boot to restore the mounts.
The following helped to get rid of the problem on the clone: (1) edit /etc/udev/rules.d/70-persistent-net.rules so the actual NIC is eth0 (2) remove entry for eth1 in Network Manager. Now everything works fine again.