I'm missing events. The administration backend agendaWeek view is not displaying events on sunday. They are not part of the HTML of the fullcalendar, so its no CSS-issue.
There are no errors in my Firebug Console nor in the error.logs of my Apache. There is no relation to another Plugin, I have disabled them all.
The frontend display of the [calendar] is perfectly fine and doesn't have that issue.
If someone has a hint on the files and lines where I can hunt that bug down, please help. I'm a bit stuck on this.