Tommy, I was listing a number of items late last night and this morning for every three or four items I tried to list I had one that wouldn't upload. When infomred, you try to go and edit the page but the upload button is hazy so you can't retry - you have to go through the whole listing process again. Very annoying!
Mangaged to get all but one up now but still can't change a few photos round.
There may be a few others struggling with this at the minute.