There appears to be an issue with the new site templates (at least I hope it is as simply as a template issue) in that a single timestamp is employed for the root node and replies within a message thread. I observed this when posting a reply to a message in a thread where I noticed that the time stamp of my newly added node was the same as all others previously posted in the thread.
Hopefully this is a simple fix for the pmdevils ... :-)
perl -le "print+unpack'N',pack'B32','00000000000000000000001010000100'"