Bug when switching to landscape and enter full screen

Hi,

I can't find where to submit a bug so here it goes...

I'm using iTunes U for iPad, iPad mini retina more specifically. The thing is that if you open some slides, flip the ipad to landscape mode, enter fullscreen (single tap) and tap again... the 'buttons' OK and Share (and the title of the window) go up and they 'collide' with the wifi signal, time, etc, icons. I repeat, this is only reproducible in landscape mode and it works fine until you enter fullscreen and exit fullscreen.

If you know how to officially send the bug to Apple, please let me know.

Thanks.