Why can't we anymore?
You can, but is is nowhere near as user friendly as it should be! I don't know the full details but the photo must be under a certain size 1mb (I think). After you have selected your photo and repositioned it in the little frame, click on the 'Save' button - I have no idea what the 'upload' button is meant to do as nothing happens if you press it.
By the way (for admin) - why are the 'thumbnails' of the pictures displayed incorrectly. They appear to be just a small section of the larger photo, a patch of grass (for instance). Why aren't they displaying as proper thumbnails (i.e. - a full image of the main photo, but smaller).
Mini rant over...!