Free QuickTime 7.1 Update available

I install QuickTime on m computer working nice i want to know is there any Update available for QuickTime ? which new feature added to QuickTime ?

QuickTime 7.1 updates available for Mac OS X 10.3, 10.4, 10.5 or later

• From the Apple menu, choose Software Update.
• Mac OS X 10.3 only: Click the Check Now button.
• Software Update checks for available updates. In the Software Update window, select the items you want to install, then click Install. Usually, you should install all available updates.
• Enter an administrator account name and password.
• After installation is complete, restart the computer if a restart is required.

You can repeat these steps to see if more updates are now available. Because some software updates are prerequisites for others, you may need to repeat these steps several times to complete the software update sequence

Security Update for QuickTime 7.2 for Windows Vista, XP SP2
Description: A command injection issue exists in QuickTime's handling of URLs in the qtnext field in QTL files. By enticing a user to open a specially crafted QTL file, an attacker may cause an application to be launched with controlled command line arguments, which may lead to arbitrary code execution. This update addresses the issue through improved handling of URLs. This issue does not affect Mac OS X.

For Windows XP:

• In Windows Explorer, navigate to C:\ProgramFiles\QuickTime\QTSystem\QuickTime.qts
  
• Right click on QuickTime.qts, select Properties, then click the Versions tab. If the QuickTime version is 7.2.0.245 or later, then the security update has been applied.

For Windows Vista:

• In Windows Explorer, navigate to C:\ProgramFiles\QuickTime\QTSystem\QuickTime.qts
• Right click on QuickTime.qts, select Properties, then click the General tab. If the "Date Created" indicates September 21, 2007 or later, then the security update has been applied.