Version 2.04 (Egerton) has some extra validation of firewall rules when routing tables are in use.
Specifically, if you are using numbered routing tables and have a rule that specifies an interface but have not also specified its routing table.
When saving the config the FireBrick will give an error such as: Source interface LAN2 not present in rule-set table (20) which suggests that there is a firewall rule referencing the LAN2 interface but it's table (20) hasn't been set.
