I have just upgraded from ASA (with AIP-SSM base license) version 7.2 to version 8.2. All of the Gigabit interfaces in 7.2 were reset to 100 meg in 8.2 and it is not now possible to set them to Gigabit.
I have rolled the ASA back to 7.2 and it can now use Gigabit speed again.
I guess I need to know if 8.2 is supposed to disable Gigabit and if so why? Seems a bit strange that an upgrade would actually remove functionality? I can see no mention of this in the release notes.