I have released v1.1 of Transpose Email plugin.
It fixes the javascript error when the blog was served as application/xhtml+xml
Thanks to Sam Stevens for informing me that my example on my blog didn’t work in firefox 😀
The plugin has now been tested on Internet Explorer, Firefox and Opera on Windows XP when the page is served as both text/html and application/xhtml+xml
Users of other browsers and operating systems please give me your feedback.