In 3.1 you will be able to mix contexts in transparent and routing mode. In FWSM 3.1 you will be able
to use bridge-groups, which comprise several interfaces at the same time. FWSM uses the
classifier to determine to what context it must send a packet, and if the same VLAN is used it would have to
use the IP address. Since the FWSM in transparent mode does not support statics/xlates, and the outside
VLAN would be the same for all contexts, the FWSM will be unable to determine what context to send a packet.