This is a new bug in version 7.0. It becomes more apparent when you try to display a historic date in its UT form. If the daylight savings time status has changed between the historic date and the current date you will get a 1hr error. The solution / work-around is to compare the DST status from the historic date to the status from the current date and if they are different you need to add 1hr or subract 1hr depending on which way the DST status has changed.
