Fancybox: IE7 and drop shadows?

This is the site for Fancybox: http://fancy.klade.lv/fancy/index/

It seems to work in IE7.

I am using this script on a larger MODx site. IE7 does not show all the dropshadow graphics. It displays some but not all, which is a puzzle.

I decided to make a really simple quick test site using the script. Same thing. I am using the same graphics and CSS for this little test site: http://maxwellbalmain.com/testgallery2/index.html

The same thing is happening with IE7: parts of the drop shadow are missing. Works fine in the better browsers of course.

Any ideas?

Thanks

Max