When i modify an image i can save to desired file extension - jpg, png - but it's not recognized when i try to upload to wordpress site or facebook. have tried renaming and trying to save in different formats -- running most recent versions of iOS and adobe photoshop.
Have you handled that iCloud full message? Take out spaces in file names... it's an old-school thing but still rock solid.. filenames shouldn't have spaces because the conversion of a space is "%20" or for asciii "0x20" both longer than a space anyway.
Make sure your images are actually CMYK instead of RGB. And 8 bit at that. Try using the '.jpeg' extension instead of just ".jpg" and see what happens.