intermittently, the ethernet port will fail to work after a reboot. Other times, it will eventually work but the boot process will be significantly longer and there will be a longer than usual delay before the LED on the ethernet port starts blinking.
If I check dmesg after one of these long boots I see the "NETDEV WATCHDOG: eth0..." fault. (it also shows up in the attached log). It dumps some diagnostics into the log, resets the ethernet adapter and then after a couple seconds i see the "Link is Up..." message.
the occasional delay i don't mind, but when it never resets and the port stays dead is a bigger problem.