The updates avaialble through Apple Support Downloads and Mac OS X Software Update
Apple Remote Desktop 3.1 Admin
http://www.apple.com/support/downloads/appleremotedesktop31admin.html
About this update
The 3.1 update is recommended for all users and addresses numerous issues related to overall reliability, usability and compatibility. It includes specific fixes for:
- remote lights out management of Xserve
- scanning computers on the local network
- installation of software meta-packages
- authentication when using directory services
- execution of AppleScript and Automator workflows
- compatibility with third party VNC viewers and servers
Apple Remote Desktop 3.1 Client
http://www.apple.com/support/downloads/appleremotedesktop31client.html
About this update
The 3.1 client update is recommended for all users and addresses numerous issues related to overall reliability, usability and compatibility.
NOTE:
It is recommended that Apple Remote Desktop version 3.1 Clients can only be managed by Apple Remote Desktop version 3.1 Administration software. Please ensure that have upgraded your Apple Remote Desktop Administration software to version 3.1 before upgrading your clients.
For detailed information on this Apple Remote Desktop 3.1:
http://www.info.apple.com/kbnum/n304569