If you click/drag through cells of the DayPilotScheduler, the cells selected are 3.5 hours in the past. So, drag between 18:00 through 19:00, and the sells selected, and what is registered in code behind ends up as 14:30 through 15:30. I can't recreate this in IE8, 7, or even 6. Safari, Chrome, and Opera are all ok with this. Once again M$ has come up with a browser that does things differently!