Parallax is choppy-Firefox vs Chrome

I am working on a parallax site and when I "preview in browser" at home everything works silky smooth in Chrome. When I take the files to work and try it there (on an amost identical machine) the animation / scrolling is extremely choppy in Chrome but looks great in Firefox. Is there any particular reason for this. I haven't tried uploading the HTML to an actual server yet and testing it "live" but I would like to understand why the dramtic difference in performance.
Any help?
Thanks
>K.

Wow... I have a field day now that i understand the basics of Parralax.
But the preview and the result are indeed choppy.
http://speeltuin02.businesscatalyst.com/index.html
The png24's are a bit on the big side, I have to make them smaller (with tinypng a realy good site folks!)
On the firefox side all things are silky smooth...
Do you have maybe a runaround?
Tnx so much I enjoy working with Muse.
Gerwald Radsma
(certified photoshop expert)

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