I need to configure port fa0/1/0 of a 4-port HWIC so that it is in vlan2 on our 1841. In global config mode, vlan 2 is no longer a command you can use to create a vlan in 12.4(24)T2. I need to configure fa0/1/0 to be in vlan 2 since fa0/1/0 is a layer 2 port, and I need to to apply a crypto map to the vlan interface, and then put fa0/1/0 in that vlan. I have this working on 12.4(6), and I'm going to swap an 1841 that I've upgraded to 12.4(24)T2 with the router currently running 12.4(6). Unfortunately, I don't have a 4 port HWIC to test with before I go to swap out the router so I can't just try different commands to see what works. Thanks!
the fact that the module is not present on the router may be the cause of the behaviour you see.
newer IOS images may perform a sanity check that wasn't done on older images.
Hope to help