Hi,
I upgraded an RB2011UiAS from 6.4 to 6.32.2.
After the upgrade, the ethernet bridge port remained disabled. 
Nothing I tried would bring it up.
I downgraded to ROS 6.18 and the ethernet bridge port came back to normal.
Given the RB2011 was an hour away, I’m very happy that I managed to get it back running remotely.
Well done Mikrotik.
The bridge runs through a pptp Internet link to an RB1100 running ROS 6.18, and the other end of the bridge.
The ethernet port is running 100 fixed to resolve flapping issues - ESX server on other end of cable.
Are there any known incompatibilities with bridging when upgrading to recent ROS versions?
Mark.
(edited) bridge config:
STP is disabled
/interface bridge
add l2mtu=1598 name=br-BR001
/interface ethernet
set 3 auto-negotiation=no name=ether5-BR001
/interface eoip
add clamp-tcp-mss=no keepalive=30s,3 local-address=10.32.70.5 mac-address=00:00:5E:80:10:02
mtu=1500 name=eoip-BR001 remote-address=172.20.203.32 tunnel-id=256
/interface bridge port
add bridge=br-BR001 interface=eoip-BR001
add bridge=br-BR001 interface=ether5-BR001