for some reason i once again can't upload images into this post. i click 'browse' and nothing happens.
I have a similar problem when I post from my PC running Windows. I assume that I must have a pop-up blocker turned on because the window that asks for the pic info never appears. I just post pics from my phone and don't worry about it.
Another problem I've had is that this site automatically puts "http" in the text window where you copy the pic's URL. This is okay as long as you know it's there and you make sure you don't have an extra "http".
I'm not sure that either of these are the cause of your problem but I thought it might help.