The 10.5.8 Update is recommended for all users running Mac OS X Leopard and includes general operating system fixes that enhance the stability, compatibility and security of your Mac, as well as specific fixes for:

• compatibility and reliability issues when joining AirPort networks.
• an issue that could cause some monitor resolutions to no longer appear in Displays System Preferences.
• issues that may affect Bluetooth reliability.

For detailed information on this update, please visit this website: http://support.apple.com/kb/HT3606.

For information on the security content of this update, please visit: http://support.apple.com/kb/HT1222.