<A target="_blank" href="http://nevermind.dk/nevermind/blog.nsf/%28lookupblogdocs%29/JBKR-7WSLEP">Jesper Kiaer experienced one of those moments</A> of panic. It worked under 8.5 but not under 8.5.1! When he looked closer, he noticed a tiny difference in how some code was handled. Jesper posted the code so you can test your own powers of deduction.