Hi Fellow Artist, I had that problem at first. Sometimes I could post pictures and other times I could not. I ask for help from the owners and they said they did not have any problems putting pictures on. I kept trying and giving up. After a while I found out what I was doing wrong, if you go to this link http://fineartamerica.com/create-art-online.html and try to load a picture it acts like it is loading but when you look on your site for the picture it is not there. So what I finally realized I had to do is click on my name up on the right of the page then click "Profile Page" you can load from this page only. Anyway that is what worked for me. Hope this works for you.
Glad you ask I wondered if I was the only one, that is a glitch in this site I guess.