Annoyingly Webkit browsers give bugger all feedback if there are XSLT errors. This was making it very difficult for me to track down an error in a XSL file because the same file was working fine elsewhere (Firefox, Opera, IE), but just resulting in a blank page in Webkit. However, after a bit of reading and re-reading about how Webkit uses libxslt I finally clicked through to the libxslt page itself and found xsldbg. It is easy to use, all you do is keep typing "continue" and it will show you the error(s) in the file. A very handy tool if you are struggling with Webkit XSLT mysteries.