Hi soulboy,
I reckon you may have greater luck posting in the 'MacOSX' or 'Applications' forum... the guys that lurk around there are probably more interested in software than the hardware issues in this section and likely can help you more
But anyway... I have noticed this happen a few times on my mbp, but not only with java... I dont believe that it is my computer as the problem with a webpage dissapears after a while. It could be the fault of the webpage you are loading... like when they update their pages the webpage designer may have screwed something up and then realises an error and then fixes it lol....
It could also be Safari's compatability with certain webpages... Make sure you have all the software updates too... some issues may have been fixed in safari or in java.
Does it work for any other page?
thats all i can offer im afraid...
cheers,
rob.