Help with Javascript problem!?

Hey guys, i have a mac and for the past few days i've been having a problem with javascript and a Yahoo! game page. Whenever the game page loads, there's a problem with the fonts on the page. The font looks "different", as in a different font is on it (not the one's that's supposed to be there). I took the computer to the Apple store and they said that this was an issue with the Java updated software on my computer and not my computer. I just get back home from the store and i notice that that other mac doesn't have the problem, and neither does my pc.

I currently have a macpro version 10.6.7 with all of its software updated including the latest version of java.

Does someone have any idea what the problem could be, before i go to the apple store again.

Thanks in advance!