The new version of Firefox interferes with the way our "Upload a Photo" button works using Flash to allow multiple uploads. Since a large minority of our members use Firefox, I had to temporarily disable this use of Flash on the site until I can find a workaround. Sorry for any inconvenience! This means that the button will only upload one image at a time for now. You can ignore the file dimension limits in the upload prompt. Our site will continue to resize images as needed if they are above those limits. The next version of Xenforo (forum software) is going to use an HTML5 uploader, so hopefully these Flash-related problems will solved for good.