Could it be that you inadvertently call xmlverbatim.xsl instead of xmlverbatimwrapper.xsl, because I'm not seeing colors, just the xml. Without the stylesheets inside xmlverbatimwrapper.xsl, the div and span tags and their classes are not displayed correctly.
+9
Just an extra something, might be cool if you can add file types to it, so that it can pick up on things like .rss .atom etc etc)
Thanks for creating this though!
I like being able to view the XML anyway, though, and look forward to seeing the colors when you have a moment to track down the problem.