Start-Enddate events not properly displayed in Month

Hi there!

I already went through the threads here, but couldn't find anything about this problem I've encountered:

If I set an event from, say, 15th of may to the 15th of june the calendar correctly displays it as a stripe in the first month - but if I then click "next month" it isn't continued there. So for the user it looks as if the event ends on the 31st of may, even though it goes on. It doesn't matter, whether I chose to display events as stripes or as fields.