I'm wondering if anyone else has run into this issue. I have a form with Infragistics CalenderInfo and WinDayView controls. The CalenderInfo is bound to a SF business binding source. The DayVew is set up to group multiple owners by date. With five owners and around 1200 appointments over a two month period the data is rendered is less than a second after the business object is filled. My problem starts when I set a logical day on CalendarInfo. Once set, the same data is taking a minute and a half to render. A check with ANTs profiler shows that it's tied up in the Infragistics code, for which I don't have the source. I've filed a support ticket with Infragistics but I thought Id check to see if any other SF user has run into this. I'm using NetAdvantage 2011 vol 2 on the latest version of SF.