Apple today released Apple Remote Desktop 3.5.3 Client which is recommended for all Apple Remote Desktop clients and addresses issues related to overall reliability, usability and compatibility.
Apple Remote Desktop client 3.5.3 is included in the OS X Lion v10.7.4 Update, and as a standalone update for Mac OS X v10.6 Snow Leopard clients. This update provides general OS compatibilty fixes.
The OS X Lion v10.7.4 and Apple Remote Desktop client 3.5.3 updates are available via automatic Software Update and a manual download from Apple Support Downloads.
More info and download link here.