Apple released an udpate for Remote Desktop client and admin software.
The 3.3.2 update is recommended for all Apple Remote Desktop users and addresses several issues related to overall reliability, usability and compatibility: http://support.apple.com/kb/DL985
The 3.3.2 update is recommended for all Apple Remote Desktop clients and addresses several issues related to overall reliability, usability and compatibility: http://support.apple.com/kb/DL986
Do not look for details, something must have changed, but you might not have to know it