"Photo Booth cannot open" due to graphics card, but nothing has changed!

Question

I've been using Photo Booth on my computer, and it's worked for over a year. Yesterday, when I tried to open the program, I received an error message:
"Photo Booth cannot open
The graphics card installed in this computer does not support Photo Booth."
Which is strange, because nothing on my computer changed since I last used Photo Booth - in fact, nothing has changed whatsoever! What could be the problem? It's a Mac OSX 10.5.6 with 2.16 GHz Intel Core 2 Duo.

Answer 1

Try using PhotoBooth in another user account--create a new one if necessary. Does it open?
Also repair disk permissions using your Install Disc 1 DVD. To do this:
1) Insert the DVD and restart your computer while holding down the C key.
2) Once the Installer has loaded, hit the enter/return key to move past the Language window.
3) Move your mouse to the top of the screen--some menus should be there. Click Utilities and choose *Disk Utility*.
4) In the left-hand column, click your hard drive's icon. (xx.x GB Fujitsu, for example) If you have Windows installed through Boot Camp, choose the "Macintosh HD" icon.
5) Click the *Repair Permissions* button. This may take more than a few minutes to complete--be patient.
6) If anything CAN'T be repaired, make a note of it and post it here. When the repair finishes, restart the computer.
~Lyssa