regression test images in Safari

[Bruce McIntyre]

Hello,

Using Safari (2.0.4, build 419.3) none of the images in

http://lilypond.org/doc/v2.11/input/regression/collated-files

appear. Instead the missing image icon is in their place.   When I view the
"missing" image in another window or tab only the alt text is displayed.  If I
append ".png" to the url of this "missing" image it is displayed correctly.
This problem does not occur elswhere on the lilypond site.

Firefox works fine.

Can anyone else reproduce this issue?

Viewing the page source didn't give any clues to why this is happening. Could 
it be something to do with the mime type? 

--Cheers,

Bruce