Hi
Dont know if it works only for administrators but you can try this:
Click on the photo you have posted
Under it you can see Edit photo, click.
A new form will appear where there is a box you can check if you want to delete the photo.
Hope it works.
No I wasn't, when I deleted it just took out the thumbnail, but left the pic, can you delete it from your end and I will try to reload them from scratch?