Is HTML5 backwards compatible with XHTML?

Question

Short question: Can I change the DOCTYPE of my existing XHTML 1.0 website to HTML5? Will this cause any problems?

Long story:

Answer 1

As far as I know, HTML5 is pretty much xhtml plus the extras so yeah, I think you can change the doctype and it would still work. They answered it here: If I use HTML 5's doctype, what will happen?