On the posting form, right above the text area, is a row of buttons, for B, I, U, etc. The eleventh button looks like a little picture frame, and if the cursor is rested on it for a moment, a little popup appears saying "Image". The Help page shows this icon, and next to it says "This will insert an image." I expected it to allow me to select an image file on my computer (such as a screen capture or photograph) to upload to my post; but when I click it, it shows a window that wants a URL – an image hosted somewhere on the Internet?
The Help page also discusses Attachments: "Depending on where in the community you are posting your message at, you may be able to upload attachments to your message. There are two types of uploaders available: the default uploader and the flash uploader." I don't see anything on the posting form that seems to relate to this.
Is there some way to upload an image file from my computer to include in a post?