Starting a thread on this specific issue. CLOUDSTACK-2492 was opened, which is basically the fact that the System VMs aren't syncing time to the host or to an NTP server. The S3 integration is broken because of this problem, and therefore could not be considered a function available in 4.1 if we release as is.
We need input from people that know about the current system VMs (the 3.x VMs), as well as the possibility of using the newer ones that we have been considering experimental for 4.1.0. What should we do? -chip