Scott, you may want to use Photoshop or even MSPaint.exe to blank out Adam's Passport address. Some people might actually take that as an invitation to go add Adam to their contact list. :)

If you run through the Audio/Video Tuning Wizard and select your webcam as the video source you shouldn't see this problem. (I'm assuming it's Win'XP from the attached image). After you select your webcam anytime you unplugs/re-plugs the USB webcam device you'll need to re-select the device in the Audio/Video tuning wizard. Otherwise, the Audio/Video tuning wizard might default back to another video source on your computer.

Same problem here (with PCI tuner and USB2.0 cam), only the 'select source' roll-down is inactive (greyed-out). Hmmm...

Same problem, what's more, you can go through the AV tuning wizard as many times as you like (as suggested by the webcam settings screen) to select the proper webcam input. Makes no difference, still uses the video capture input from the tvtuner card. Frustrating.