Jquery transitions stop working!

Having a strange problem on a wordpress site – http://www.txproit.com/wordpress/.

The meteor slider and news-ticker (both relying on jquery for transitions) stop working after opening up a new tab and visiting for example http://www.google.com and returning to the website’s tab in Firefox 6.0.2 and Chrome 13.0.782.220m. Anyone has any ideas what is happening here?