jquery jerky parallax scrolling

I have parallax scrolling on this page http://www.beaconhilldesign.co.nz/onl/paralax.html.
Works fine in all browers except Firefox (latest version) where the movement is jerky.
Can anyone tell me whay this is and more importantly how to rectify?
Neil_BradleyWeb UX/UI DeveloperAsked:
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Greetings Neil_Bradley,

Parallax is indeed a neat plugin! But in order to use it you have to make sure your import it first! ;)

From my console:
Failed to load resource: the server responded with a status of 404 (Not Found)

See if that fixes the problem since most likely your browsers were catching it locally!

Neil_BradleyWeb UX/UI DeveloperAuthor Commented:
Hi jjperezaguinaga,
apologies for the error with in test page. The missing link has now been fixed.
The problem is still there when viewing the page via Firefox..
Hello again!

I'm sorry, but I can't preview your demo in my browser (Chrome), as it seems you are not triggering parallax. Can you update that please, so I can make sure the code is not working?
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Neil_BradleyWeb UX/UI DeveloperAuthor Commented:
I have re made the link: http://www.beaconhilldesign.co.nz/onl/test.html
Tested it in IE as far back as version 7, Chrome, and Safari and no problems. In Firefox the scrolling is still jerky.
Thanks for your patience..
Hello Neil!

No problem at all! First, my apologies, I thought you were using other parallax plugin! http://stolksdorf.github.com/Parallaxjs/

However, I tried it on Firefox 11, Chrome, Opera and IE9 and it seems working fairly good. I see, however, the author of the plugin noted that there are indeed some bugs in Firefox.

http://jonraasch.com/blog/scrolling-parallax-jquery-plugin (comments section)

Now, since it's a third party plugin, I could advice you to send the author if he knows about the issue. If you like that plugin too much, that could be your best option, but I bet there are other parallax like plugins around :)

Hope it helped!

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Neil_BradleyWeb UX/UI DeveloperAuthor Commented:
Thanks for persisting with this question. Yes, you are correct. I see that there have been a few issues with this plugin. I think I will troll the web and find another less buggy version.
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