Interior Lights Won't Shut Off - How to Troubleshoot?

[BLSJDS]

I did a decent amount of searching and found many similar issues, but no resolutions, so here goes:

2006 X5 3.0 with Manual Transmission - I got off the train this evening and the battery was completely dead. Called my wife, jumped it, and drove home.

When I got home and got out of the car, I noticed that the interior lights would NOT slowly dim and go out. I pressed the interior light button and held for 3 seconds and the interior lights went out. A few minutes later, they were back on!

Obviously this was the cause of the dead battery, but what is causing the interior lights to stay on, even with all doors closed tightly? I couldn't visibly locate any door "open" switches to test, and I did disconnect the hood switch, but that didn't solve the problem.

Any ideas? For now, I just pulled the interior lights fuse in order to keep the battery from draining. Everything else seems to work fine.

Thanks in advance for any / all help!
Dan