Unwanted behavior when using QLocale's date/time formats on Mac OS X Lion

The default date format (long format) on Mac OS X Lion is "dd. MMMM y"
and the time format (long format) is "HH:mm:ss t".

Qt can't handle both formats, the results are as followed:
Date:
"dd. MMMM y" => "31. March y"
"HH:mm:ss t" => "16:08:23 t"

Qt only handles date/time formats described in the Qt documentation.

In addition, if I change the date/time formats in the control panel under Windows 7, the formats are updated in the views.
On Mac OS X Lion the date/time formats are only updated if I restart the application.