The album scan management page has undergone some changes to bring it up to the standard look and feel of the site. I've also embedded a new uploader script in the page itself, which makes use of the excellent
SWFUpload. This means you can now select multiple images in one go using the file browser, and even remove and add images to the upload queue while an upload is running. Try it out via the "Manage Covers" edit menu link -- if all goes smoothly, the old "Add Covers" link will be retired.
Note that this system requires Flash 9 and Javascript to run. The page does fall back to regular HTML upload controls if Javascript is disabled, so you won't lose any functionality.