brief and no header options for messages displayed in the list view; also Tools->View->Snowl tweaked, new submenu Layouts which includes layout group, header toggle group, toolbars checkbox toggle. List and sidebar toolbars can be toggled off. Contextual enable/disable of menuitems. New snowl toolbarbutton, mirrors the statusbar button. Layout button removed.

// Header view pref: 0 = none, 1 = brief, 2= full
pref("extensions.snowl.message.headerView", 1);