Update! If you can’t click “Allow” on Flash sites it may be due to the new Mac OS 10.7 Lion software. See this newer blog post: http://blog.mailvu.com/blog/adobe-flash-issue-on-mac-os-10-7-lion/
Don’t forget to set mailVU.com as an approved website in your Flash System Preferences. This blog post shows you how to set your Mac System Preference.
Recent upgrades to Mac OS X 10.5.8 and 10.6.5 has caused problems with the iSight webcams on Flash sites. This can also happen with external USB webcams on Macs with the built-in iSight camera as they use the same device name. If your iSight camera still works properly with PhotoBooth and iChat, try the following solutions:
(1) If you have installed Google plug-ins, uninstalling them may restore proper iSight function with Flash and Mac OS X 10.6.5. If Google is your problem, the GoogleVoiceAndVideoUninstaller.app should be in your hard drive’s Library/Application Support/Google/ folder. (not your home folder library)
**This solution has been the #1 remedy for mailVU users**
(2) Installing the new Flash beta fixes sites for many users:
Clicking this link will download the beta: http://tinyurl.com/2frejs4
(3) Another approach that may restore full use of the iSight webcam is to uninstall Flash 10.1 using the Adobe flash uninstaller, install a lower version of Flash (e.g. 9.0 for OS 10.1 – 10.3), uninstall Flash 9.0 with the Adobe uninstaller, then reinstall Flash 10.1).
(4) If you are using Safari as your browser be sure to update to Safari 5.0.3: http://support.apple.com/kb/DL1070 It contains “… improvements to usability, compatibility, stability…” that have helped some users.
One final tip: Sometimes an issue occurs on Macs using the Firefox browser with Flash applications. Try switching to Safari or Chrome and see if the problem persists.
To confirm the iSight webcam issue is resolved go to mailVU.com and click Allow for webcam access.
If the iSight webcam is still not working try this troubleshooting guide from Apple.
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