[css3-multicol] splitting floats across column boundaries

Take a look at this file. It has a div floated left with six lines of text
in a 2-column layout containing eight lines of text

http://hg.csswg.org/test/raw-file/50587184a512/contributors/adobe/incoming/f
loatLeftMulticolBreak.html

In WebKit the columns are balanced by splitting the float in two. In Gecko
and Opera the float remains intact and the columns are not balanced. Should
I expect more interop here, or is this a vague area that css3-pagination is
meant to resolve?

I am strongly in favor of splitting the float in an instance like this.

Thanks,

Alan