Re: Hmm.
I did check your post (using edit--one nice thing here is that we can check the actual codes used to perform some task, hopefully without erasing someone else's post) and it has the jpg URL listed twice. The only way to get that is to post the URL in both the URL box and the description box. I tried it both ways and by listing the thing twice does it work for me. Of course, I'm having a feeling my browser is acting differently than yours. I use Firefox 4.0.1. I certainly get different Right-Click menus than you.
I tried posting the image without text and it didn't post. :-( That's in addition to having nothing to click on. I got a blank black box.