Hey Ben,
Don’t mean to be a damper, but I am pretty sure OSPF is broken in 4.6. Just be aware of this when going through your troubleshooting. Please see:
http://forum.mikrotik.com/t/ospf-dropping-routes-v4-x/36060/1
http://forum.mikrotik.com/t/route-ospf-error-discarding-packet-locally-originated/35169/1