Main calendar view not switching

In the Calendar view running 8.5.2FP3 on Windows XP.

When I click a date using the small calendar in the top left pane, the main viewer does not change to the date clicked (it is set to show two days).

I’ve tried refreshing the mail template with both server and local copies but nothing has worked yet.

This has happened to a few users. One fix that happened to work was giving the user local admin rights (done for different reasons). That is a solution I’d like to stay far away from.

Thanks in advance.