Hello,
This is not really site feedback. I'm just wondering if you could share how your comment_upload is set up. I just installed that module (5.x release version) and it isn't displaying the correct elements on the screen - there is a Preview comment button below the Attachment field, but no Save and no Post comment button. It also doesn't say "Changes made to the attachments are not permanent until you save this post." (And once the comment has been previewed and posted from the preview screen, the file doesn't upload.) The module has no maintainer at present, so I'm looking for help wherever I can find it, and I read elsewhere on your site that it uses comment_upload.
Thanks in advance,
jrd