[css-multicol] remaining issues

I'm preparing for the CSS f2f meeting where I hope to resolve all the
remaining multicol issues. I my head, I find only three of those:

1) the clipping issue

     http://lists.w3.org/Archives/Public/www-style/2013Mar/0057.html
     http://lists.w3.org/Archives/Public/www-style/2013Aug/0269.html

   It seems we can go in two directions: more clipping or less
   clipping. I leaning towards less clipping:

     http://lists.w3.org/Archives/Public/www-style/2013Aug/0526.html

2) 'column-fill: auto' in unconstrained environments

   I suggest we should honor 'column-fill: auto' in unconstrained
   enviroments, thereby relying on explicit column breaks to break
   columns:

     http://lists.w3.org/Archives/Public/www-style/2011Dec/0455.html
     http://lists.w3.org/Archives/Public/www-style/2013Aug/0274.html
     http://lists.w3.org/Archives/Public/www-style/2013Aug/0304.html

3) z-order of column-rule: below or above border

   I suggest we specify that "Column rules are painted in the inline
   content layer; below all inline content inside the multicol element,
   but above the border of the multicol element."

     http://lists.w3.org/Archives/Public/www-style/2013Aug/0223.html
     http://lists.w3.org/Archives/Public/www-style/2013Aug/0531.html
     http://lists.w3.org/Archives/Public/www-style/2013Sep/0006.html

Comments from implementors (and everyone else) is welcome. 

Other remaining issues?

-h&kon
              Håkon Wium Lie                          CTO °þe®ª
howcome@opera.com                  http://people.opera.com/howcome