This is an interesting article note about a problem we have had with some computers.

http://www.javaworld.net/javaforums/showflat.php?Cat=&Board=javabeginner&Number=7900&page=18&view=collapsed&sb=5&o=&fpart=1

this link actually shows the whole exception
http://mozdev.org/pipermail/jrex/2005-February/001457.html

another link with the solution of moving the temporary files folder
link

Link talking about NoCache on webserver and patches to IE
http://forum.java.sun.com/thread.jspa?tstart=45&forumID=38&threadID=530435&trange=15