When you are posting, there is a grey button at the bottom right corner that says Post Quick Reply Go Advanced Cancel.
Click the Go Advanced button.
That will open up a menu, down below where you download the attachment or provide the link to where the image is (photobucket...etc)
Find the Manage Attachments button.
When you click that, another window opens with an area to download a file, or provide a link to a photo.
I am working on having better controls....still missing the toolbar to highlight words, at posting codes, italics etc...
Once I resolve that we should be able to see images instead of thumbnails.
How did you do with your Avatar...need some assistance?
Surfcrest