I'm in the process of creating a number of DNN portals (with content localisation and a very attractive custom skin!) and I was trying to work out how to make a fully XHTML/CSS-compliant skin.

I've read Core Team blog posts about this from two years ago but can't find anything more recent.
I wanted to ask - what is the DNN Core Team's stance on compliance with the W3C standards for X/HTML and CSS?

I can create pure CSS skins and semantic markup, or use tables (eugh), and my code is fine - but the DNN code injected (menus, visibility tokens, search bars - everything) breaks any attempt at getting to even HTML 4.01 compliance (I'm aiming for XHTML 1.1, but that's not the point).

I would also like to do some work on the DNN Core in future, to ensure that some of the modules and tokens do produce compliant code.

So what are the comments from the DNN team on this issue, and if I were to contribute my skills at creating beautifully semantic markup (IMHO ;-)), how would I go about submitting any changes to the Core?