Note: There might be minor issues in quirks mode (no <!DOCTYPE> specified). It works but there might be a bad pixel here or there. DayPilot Scheduler might require some tweaking (IE7 in quirks mode).
Both the DayPilot DOM tree and supporting JavaScript code are complex and it may interfere with the rest of your code, especially:
Sometimes it can be fixed inside DayPilot (especially the CSS). Please contact support@daypilot.org to check the options.