Could you please
1. what version of Opera do you use?
2. What device do you use? (desktop, laptop, tablet, phone)
3. Please send me the picture you are trying to upload on mbulla@cakesdecor.com.
I downloaded the Opera v. 18 browser and tried to upload picture and works well.
-- Michal, http://cakesdecor.com | My Facebook: http://www.facebook.com/michal.bulla