Users have noticed a problem adding an appointment and wondering if others have seen it. Can't find a bug entry for it and I've only been able to reproduce reliably on IE7.
1. Make a new appointment on the calendar.
2. When the Quick Add Appointment dialog appears, click the down arrow next to Start Time to make the mini-calendar appear.
3. Next click somewhere to make the mini-calendar disappear.
4. Again click the down arrow next to Start time to make the mini-cal reappear.
The result is a misformatted mini-cal that can be made right again by refreshing the browser. See the attachment.