Dr Phil( Plait), the Bad Astronomer, has a post regarding this:

http://blogs.discovermagazine.com/badastronomy/2008/12/01/pining-for-mars/

I like this part:
"But one website insists it is a leaked image that ‘could get someone killed.’"

when.. in the paragraph just above:

"The unusual image was featured in a NASA press release in 2004,"

So, NASA 'leaks' top secret stuff, through the medium of... official press releases??