Sorry for being so stupid but I can't see how to attach something to the a discussion!
I have Vanilla Version 2.1.8p2
I have uploaded and activated the plugin.
I have allowedview the MyAttachments in the profile but I just can't see how to upload an attachment!
It's the other way around: you can attach files to discussions and comments and you'll see a list of those attachments in the My Attachments tab.
You need to install File Upload and My Attachment will show a Tab in the user profile showing his/hers uploaded files and especially pictures.
It might also work with the new Uploader plugin @vrijvlinder just released.http://vanillaforums.org/addon/uploader-plugin