Router rebooting - out of the blue

Got a RouterMaxx 6 port router running ros5.9.

Have two other RouterBoards a RB750G(ros 5.9) and a RB1100 (ros 5.9) that both report ethernet connections fluctuating 10M/1000M a few times and then the RouterMaxx reboots.

What should I be looking for to resolve this? Is ros 5.9 stable?

Rick

Looks like it may be a multi-core issue with ros5.9

per http://forum.mikrotik.com/t/routeros-v5-9-released/52174/132

I have disabled the RouterMaxx and rebooted. It came back to life. Now to monitor.

Rick