Operating system and graphics card
Broken: (example: 2.69.7 4b206af, see splash screen)
Short description of error
issue with save the image and reloading image and save again and reloading again.
it not occurs in 2.75a...
Exact steps for others to reproduce the error
prepare object for texturing
go to image editor save it as jpeg with 100% quality
in image editor reload it,
and save it and reload it
till u get quality in which (blender reset what u have set 100% quality)
conclusion ... this not happen in 2.75a ,