Compatibility of HTML and CSS in design on Habré

The last time with the design on Habré is getting worse and worse ... More precisely, not with the design but with its presentation with HTML and CSS constructions

All new decorations and readings of the code appear with hot discussions, where to put a comma ...

But where is the compatibility with eg IE6? Let's take a look here:
www.habrahabr.ru/blog/i_am_clever/18819.html
The topic itself goes far down, leaving us a tag cloud and a live broadcast for review.
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I do not mind the innovations from CSS 3.0 and others like that, but let's not forget about the users of ordinary browsers.