you can call in when they receive it (look at the sticky for speeding up your pal) and see if the photo passes or not. If they don't like it, you will have to re-submit just a photo that is good, IMHO. I took my own photo with a digital camera and printed it out with an ink jet on plain paper and it was accepted ok. just make sure the head size is at least 30mm and the photo size is NO LARGER than 45mm x 57mm (i.e. the photo does not have to take up the whole space on the photo instruction sheet).
follow the sticky on speeding up your pal, and things should go pretty quick. they received mine on the 08/23, scanned it in 09/01, everything was fine, did my interview during my call in to check everything, they already called one ref, gave my other ref the case number and 800 number to call in.