Apparently the first patch was buggy, in that its attempts to fix what hour is what actually broke what hour is what. All's well now, though. Go clickly and get your WM5 phone ready for the new times that are a-comin'.
These changes could cause clocks and Microsoft Outlook calendar appointments on Windows Mobile-powered devices to display incorrect times for March 11 – April 1, 2007 and October 28 – November 4, 2007 and again in subsequent years. You can find more information about the exact dates and potential impact in the Changes in DST section.