Apple has posted updates to iTunes, QuickTime and Front Row:

iTunes 7.6.2
Rent and download your favorite movies with iTunes on your computer or directly to your living room on Apple TV. Enjoy rented movies in sizes up to 720p HD with surround sound on your Apple TV and sizes up to DVD-quality on your computer. Transfer your rented movies from iTunes to your iPod or iPhone and enjoy them on the go.

Also, purchase and download your favorite TV shows, music, and more directly on your Apple TV. Effortlessly transfer purchases made on Apple TV back to your computer with iTunes.

iTunes 7.6.2 provides bug fixes to improve stability and performance.

QuickTime 7.4.5
QuickTime 7.4.5 includes fixes that enhance reliability, improve compatibility with third-party applications, and address security issues. This release is recommended for all QuickTime 7 users.

For detailed information on the security content of this update, please visit this website: http://www.info.apple.com/kbnum/n61798.

Front Row 2.1.3
This Front Row update provides for bug fixes and improved iTunes compatibility.


If you would like to install one of these updates select Software Update... from the Apple Menu at the top left of your screen.