This is a page from the Cascading Style Sheets Working Group Blog. Some other places to find information are the “current work” page, the www-style mailing list, the Future of CSS syndicator, and the issue list on Github.
Do you want to know how the CSS WG works? Fantasai has written about:csswg, An Inside View of the CSS Working Group at W3C.
display: run-in
from CSS2.1 to CSS3 due to lack of interoperable implementations.vertical-align
from the required list of properties that apply to ::first-line
.clear
to make things move up. But we need to evaluate web compat since Acid2 and therefore all browsers do the former.)