I'm not sure if this applied just to SBS, to all Windows Server 2008 builds, or just to 64bit... but there was a memory leak in the event collection DLL on the client. Ryan worked with Kaseya to identify the issue and they released an updated DLL.
original DLL with the problem: KEventLog.DLL ver 5.1.0.1
updated and fixed DLL: KEventLog.dll ver 5.1.0.3
