Unfortunately Microsoft seems still to have problems with updating their Download Site, but there is a very important quickfix for all (Wince 5.0) ATL users in the october update:
A memory leak may occur when calling IDispatch::Invoke(). The file(s) with the new source code changes for this component can be found in the directory %_WINCEROOT%\:
Download this set of updates for Windows CE 5.0 released during the period of October 1 - October 31, 2009.
You can find the October 2009 Update here.
Keep your OS up to date!