...but at least now I know the answer, so I'm sharing.
The FAQ on the LJ time discrepanies in comments: http://www.livejournal.com/support/faqbrowse.bml?faqid=156
The FAQ on the LJ time discrepanies in comments: http://www.livejournal.com/support/faqbrowse.bml?faqid=156