EduBuzz bloggers are reporting that NextGEN Gallery is requesting a login when they try to upload images. This may be related to the web filtering change, but we don’t yet know.
If you’re affected, click the button to say you *don’t* want to use the “Flash uploader”. You’ll then be able to upload successfully. The only downside is that you’ll be limited to uploading one image at a time. Thanks to Peter Kingsbury at Pencaitland Primary for the tip.