LED Cinema Display iSight Firmware Update 1.0
that firmware update corrects an issue with the built-in iSight camera on the LED Cinema Display where the camera may not be recognized by applications.
To complete the firmware update
process, please follow the directions in the updater application (/Applications/Utilities/LED Cinema Display iSight Camera Firmware Update.app).For more data about that update, please see: http://support.apple.com/kb/HT3957
Orginal post by Mike