Ham Radio Forum

Numerous security vulnerabilities have been discovered in QuickTime versions prior to Version 7.5 that make it possible for remote attackers to execute arbitrary code on a user's computer. You can read about those vulnerabilities here in Apple Knowledgebase article HT1991 http://support.apple.com/kb/HT1991.

If you have a version of QuickTime prior to Version 7.5 installed, you should download and install the latest version as soon as possible to reduce the risk of serious damage to your computer system.

http://www.apple.com/quicktime/download/

-Bob