When using a DateTimeField strftime('%d. %B %Y %H.%i', strtotime($myDateTime)) returns 06. Juni 2013 19.%i (instead of 19.00)
I have seen that in datetime.php mm is used for the minutes, but it does not do the trick
I am not looking for a solution, I already found one: I left out the time part and used $myDateTime.Time24() in my template to get the time.
Anyone willing to create a bug report be my guest.