No pic here either.

Mac--to post a pic, toward the bottom of your message editor window, you'll see a button marked "Manage Attachments." Click that. A small screen will open, allowing you to browse for a file on your machine. Once you've found it, click the "Upload" button on the right of the small screen, then close that window. Then, click the "Submit reply" button at the bottom of your message editor window.

If you did all that but the pic didn't upload, be sure to post back with any error messages you got when you tried.