swa66 - 10:49 pm on Jan 26, 2013 (gmt 0)
I've been using polyglot html5 for a while now. I like it a lot.
I've also run into an obstacle when dealing with adsense - I feared that one.
It turns out adsense scripts use the document.write() method - which is unsupported by browsers when they are dealing will well structured contents such as xml served html...
Ads simple do not show.
I've started a separate thread over in the adsense forum: [webmasterworld.com...] for those interested - it includes a workaround that might or might not be all that "legal" - hard to judge at this point.