Ok-I've noticed 2 things.
1) the link above doesn't work for IE folks-You'll have to go in from the homepage, and go stones->strange quarks->origin of man(top row, third along from left).
2)If you use firefox, you will find that, rather than getting a nice caption "tool-tip" when hovering over the image as in IE, you get
[removed]window.status='
';void(0)instead in the status bar on mouse hover. This is due to the differing ways that IE and firefox handle the window.status property, and also the fact that firefox disables processing of window.status by default. So either strip the caption out of the above code, or, if that doesn't appeal aesthetically as a solution to you, you can check "Tools → Options → Content → Enable JavaScript / Advanced → Allow scripts to change status bar text". This won't give you the nice tool-tip behaviour of IE, but will display the caption in the status bar unadulterated
when you click the picture. On hover it still looks like a dogs dinner.
None of this helps you anymore than the above already has...the caption is "oingg si dimn ym...", which easily rearranges to give "my mind is going...";google this and the first hit returns 2001:a Space Odyssey.
But it may help for future puzzles.