In my "URLs" post, I mentioned a message ID as an example of where I saw the problem. Can we get a "download message-ID" feature, where I could enter a message ID and Usenapp would download it directly from the server? Would be useful to enhance the Headers popout to make the message IDs there clickable to match.
I imagine this is needed as part of NZB handling, so you probably already have the code but not the UI?