Make remaining 40em specifications into 720px, like post excerpt width specification.
Restrict width of member area of excerpt meta data.
Use float instead of absolute positioning for .post-tools and .post-stats.

This way, they don't bleed on top of one another (sometimes happened).
Properly vertically center the contents of excerpt meta area.
Fix member area of excerpt meta: Age text no longer truncated wrong in case of short display name.