Recently I tried to install Java For Mac OS X 10.5 Update 4 Version 1.0 to my computer. When I tried to install it comes up with this message: "The Update "Java for Mac OS X 10.5 Update 4" can't be installed. The installer could not install some files in "/". Contact the software manufacturer for assistance." Now I can't load anything that use Java on Firefox. How can I fix this?