When a user puts a date in a cell and then uses the hover and drag down approach to copy/paste that date down multiple rows within a spreadsheet, if the server is in a TimeZone that observes Daylight Savings Time (America/New_York, for example) and the User's action results in the crossing of a DST boundary, the dates appearing in the cells shift away from the top of the day (midnight) in any date past the boundary

Setup: Launch server with -Duser.timezone=America/New_York
Steps to reproduce
1. enter 3/8/2013 into a cell
2. Then drag that cell down 10 cells. If you click on 3/11 or beyond, you can see that the times have 01:00am as their time rather than midnight

Actual: the autofill dates should still show midnight as the time