Did My Ignition Switch Fail?

[Whodeeny]

I took #821 out last night for a cruise at night for the first time. The car ran great. I made most of the run with the headlights on as it was getting dark. All the other lights were working fine also. As I finished the ride I pulled into the garage and switched the lights off and they went off as they should. Then I turned the engine off and it stopped as it should. However with the ignition switch in the OFF position and the key pulled out (or left in) the red ignition warning light just above the switch remained ON. There was still power to the dash instruments too as the gas gauge indicated 3/4 full. I could turn the headlights on also. This was all working fine last Sunday which was the last time I drove it. I didn't have anytime to troubleshoot things as it was getting late at night. Any ideas as to what is going on? My first thought was the ignition switch has failed. Any suggestions on troubleshooting would be appreciated.
Thanks.
BD