I smell things
There are no girls on the internet.
I stated this before, its a Myspace format for picture storage.Look up any random profile there and look up any pictures and check their filenames.They'll look identical in format, x being a letter and y being a number;"x_(jumble of x's and y's)
Even so, why would you re-download a picture you already have on your computer to post it on the forums?
Because iPhones can't save an image then reupload it to the forums probably.
I assume that he/she would have uploaded it to myspace via their computer, because as far as I can see the myspace app doesn't allow uploading of images.
So she probably took it with her iPhone, synced it to her computer then uploaded it to Myspace since it apparently can't allow uploading of images and along the way compressed it greatly.
Wait I don't think I made this clear, I mean the iPhone is in the picture.