I see no need for all this hostility - the 777-300 and 300ER are different aircraft and not visually identical, so pointing out that the picture is wrong is a perfectly valid concern. While it's not the highest priority, I've added this to my internal issue tracker so it doesn't get lost.
Me and Moldy sorted some of the photo problems btw (767-200, 777-300, Beech 99, 146-100) The 777-200 also got a new picture