Shared Calendar Folder Data Won't Display

I have an end user who can view the appointments in a shared calendar folder in Day or Week but not in Month view.
If I go to Print they show up in Print Preview.
If I am in Month view and I double click on a day, the appointments do not show up in the pop-up day view.
If I change the display settings to Details instead of Calendar, the appointments show up.
5 other users can view the shared content OK.
All are on 8.0.3 HP2