There is a new editor's draft of the CSS3 Grid Layout module available: http://dev.w3.org/csswg/css3-grid-align/
These updates are minor and include:
◦ Section 2.2: A minor correction to the markup in Example 1.
◦ Section 7: Specified item placement behavior for undefined grid lines.
◦ Section 7.1: Specified that for the grid-column and grid-row properties, 'start' is only applicable to the starting line position and 'end' is only applicable to the ending line position.
◦ Section 8.1: Updated the spec to better describe the behavior of box model calculations for stretch alignment.
We look forward to comments and feedback, and would be happy to discuss these changes further during a future telcon.
Thanks, Grid Spec Editors