There is a 500 pixel(I think it's pixels) size limit on the pics. I crop then resize my pics to 640X480.That usually gets them under the size limit--I say usually! It would be easier if they would just limit the size to 640X480.
I have had a few questions myself,things I like to clarify,such as when I edit a listing I cannot change the price on the item even though it has received no bids. These were items I was relisting but can't change the price.