If you work with applications that utilise the webcam in Flash you may have noticed some recently introduced issues with some Apple iSight cameras on Mac OSX. The problem described in this bug report has been reported fairly widely and has frustrated many. For some users the uninstall of the 'Google Camera Adapter' resolved things, for others the recent Skype Beta seemed to be the culprit. The problem first emerged with flash Player version

Now there is good news. The problem has reportedly been fixed in the release candidate 10.2 of Flash Player which is available now on Adobe Labs. I recommend you upgrade now.