The Upload Wizard gives confusion when trying to upload a pic. Some fields are marked mandatory with asterisk (Description) while some are not (Release rights, source and author in "This file is not my own work"). Later when the user clicks on next the fields are highlighted with red errors.
This is important because the natural tendency is to skip whatever is not marked with asterisk.
Also related bug, the error message for "Author" in "This file is not my own work" is shown only when the input box is selected and then left blank. This error message is not shown when the next button is clicked and the field is just highlighted with red.
If my words aren't clear see the attachment.