ContentL

More content than we had before, and the height of a div is determined by its content . . . so this column is now quite tall. Blather blather, some more text just to make this div bigger. Blather blather, some more text just to make this div bigger.

ContentR

This is content of possibly secondary importance?

SidebarL

This is an important sidebar -- menus and suchlike? and appears at every width

SidebarR

This is the less important sidebar, and disappears from narrow screens.

diagnostics:
ruler 1200 pixels wide

CMS nimda/g_publish called by gridtest
page: