New 6.41rc version has been released with fixed for some problems from 6.40:
http://forum.mikrotik.com/t/v6-41rc-release-candidate-is-released-new-bridge-implementation/110759/1
New 6.41rc version has been released:
http://forum.mikrotik.com/t/v6-41rc-release-candidate-is-released-new-bridge-implementation/110759/1
Version 6.40.1 has been released:
http://forum.mikrotik.com/t/v6-40-1-current/111026/1