All day events are outputted with time of day

This problem occurred when I was subscribing to one of my calendars with apple ical, and I noticed that the all day events weren't showing up. I did some testing, and I found that when I removed the time part... it would register with ical as an all day event. ie:

DTSTART:20061006T000000Z

changes to

DTSTART:20061006

and it works. This could be a matter of a few substr's in the right place, but I have no idea where to put them.

Thanks