The faded footer but clear header might lead to the possibility of the
printer header/alignment needing to be cleaned, adjusted, and tested.  It
couldn't hurt to check the ink supply as well, and run a test print for it.  
Try printing the document at the slowest setting possible, with diffusion (or
other highest possible quality).  Then see if the green background still
appears.  The size of the jpeg file was not specified. I believe you stated
the background was set to white, if at all possible, you might consider
deleting the background, irregardless of color. This might get rid of that
perplexing green (is it pale or grayish?). This matters only if the jpeg
background overlaps alot.  Then try a standard print and compare. Sometimes
if you print using "dither-fast", which is that "dot-matrix" type pattern,
mysterious colors might show up, but usually in the gray spectrum.

Make sure you have selected Automatic Back-up for ALL documents, which does
not occur by defualt.  You might want to copy this template/doc, and save the
original, too.