Internet Explorer Background Repeat on container for floating elements

I am attempting to build a gallery page for a website I am working on, Internet Explorer 8 compatibility is a must. After building the script out for the page, I take a look in internet explorer and run into this interesting issue. It seems that my background image is running fine until suddenly it just stops. I have no idea why this is happening. The "galleries" are generated on the fly using javascript, and have CSS applied to them.

A link to the site is: http://dav开发者_Python百科erto.ipwn.me/2011/galleries.html

I appreciate any help I may get.

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add a style to #cm

height:100%;