These icons were, with thanks, taken from the Tango Icon Library, version 0.8, from:
http://tango.freedesktop.org/Tango_Desktop_Project

Changes:
renamed text-x-generic to text-plain
added document-save-all (based on document-save)
renamed system-log-out to application-exit

Some icons were found elsewhere:

zoom-in:
http://commons.wikimedia.org/wiki/File:View-zoom-in.svg

zoom-out:
http://commons.wikimedia.org/wiki/File:View-zoom-out.svg

configure-shortcuts.svg:
http://commons.wikimedia.org/wiki/File:Preferences-desktop-keyboard-shortcuts.svg

help-contents:
http://commons.wikimedia.org/wiki/File:Help-contents.svg

preferences-other:
http://commons.wikimedia.org/wiki/File:Gnome-preferences-other.svg (GPL!)

document-edit:
http://commons.wikimedia.org/wiki/File:Edit-find-replace.svg (minus magnifiying glass)

