Apple has released updates for QuickTime, iTunes and iPhoto. You can obtain ’em via the Software Updates component of Mac OS X’s Systems Preferences app.
QuickTime 7.6.6 addresses 16 security issues on both the Mac and Windows platforms. iTunes 9.1.0 has five security fixes and adds support for iPad syncing and iBooks organizing and syncing. iPhoto 8.1.2 adds iPad support and boasts syncing improvements.