I have never been able to upload an image with a specific JPEG suffix to any forum.  (The upload seems to go through but the old image is retained, as if I never did anything.)  If I manually change the image name to a JPG suffix, no problem.  But this seems almost like a bug these days.  Why won't the forum accept an image--identical images--whether the suffix is JPG or JPEG? 

(It has always been this way for me on all our forums with any operating system and all browsers I've used.)