I had quick fix with double init the sparkline functions, but forget to look for the real reason. If you go in http://www.coh2.org/livestreams/list click through the tab menu and switch back to the list view they are working. Not sure yet why they aren't initialised on first behave in others browsers than Firefox.
this works
Code
$('.sparkline span').sparkline();
$('.sparkline span').sparkline();
but not this
Code
$('.sparkline span').sparkline();
Fade effects are at the moments just the "normal" ones, I didn't spend any time on making it look better. Feel free to make them look good and post code here