Symptom:

ASA reports line protocol as UP for ALL vlans associated with the sub-ifs of the main interface
SFW(config)# int gi 1/3.800  
Mar 25 2009 14:33:59 SFW : %ASA-5-111008: User 'jeylott' executed the 'interface GigabitEthernet 1/3.800' command.
SFW(config-subif)# vlan 800   <<< add new vlan
Mar 25 2009 14:34:18 SFW : %ASA-4-411001: Line protocol on Interface GigabitEthernet1/3, changed state to up
Mar 25 2009 14:34:18 SFW : %ASA-4-411001: Line protocol on Interface amber-fiber, changed state to up
Mar 25 2009 14:34:18 SFW : %ASA-4-411001: Line protocol on Interface v500, changed state to up
Mar 25 2009 14:34:18 SFW : %ASA-4-411001: Line protocol on Interface v501, changed state to up
Mar 25 2009 14:34:18 SFW : %ASA-4-411001: Line protocol on Interface v502, changed state to up

Conditions:

When you  add an additional subinterface to a main interface and then configure a vlan