Topaz labs have a program called DeJpeg which might help. It's a plug-in for Photoshop and similar programs. There is an early version available as a free download (do a search for dejpeg) or you can download the latest version for a 30 day trial at
To Err is Human, To really foul things up you need a computer.
|Orange-tip Butterfly by anisah|
from Nature's Colour Palette
|Windswept juniper by Kreber|
from Wind power