Is there a known conflict between jQuery tools and the Google Visualization API in Safari?

I am trying to use on the same page some interactive charts and and apple overlay effect.
Check this example:http://bit.ly/9ZC095
the charts look ok, but if you try to open the overlay (click on About or FAQ) the content appears degraded (this .

Everything looks fine from other pages with no Google Visualization content ? e.g. try clicking on About or FAQ from the parent page:

http://bit.ly/a9Lmc7

Is there a straightforward way to fix this issue?