yes try changing the file ending to jpg, not jpeg. I find most people, (my OH included) can't upload mainly because they have no idea where the file they want is actually stored on their computer. Just because it's in mydocuments, doesn't necessarily mean it's findable as it may be a zip, or even in a folder gasp! This forum is a tad weird, for example, in thepotting shed on the forkhandles thread that is a gazillion pages long, instead of it offering 'last' as a page offering, (like every other forum for the last 10 years) you have to click on the last poster and the arrow????
Anyways, now apple is on the slide, and android and win8 taking over, maybe we'll have a standard set, then it's far less complicated. I think the main stress people have is that there are 500 ways to do the same thing, and so you end up with people getting confused.