Comment 6 for bug 486605

Thank you.

So...
stock_lock is neither part of the proposed default icons from the proposed icon naming spec [1], nor is it following the presented naming schema, nothing we can do here on the oxygen side of things. As I see it there are two approaches to this:
a) look if there isnt a similar or same icon that is part of the proposed default icons as per [1]
b) import that icon into pavucontrol and either install it, as say pavucontrol-locked, in the hicolor theme or in pavucontrol's data directory and take care of icon loading somehow (no idea if GNOME/GTK+ got convenience magic for that).

As for emblem-default, I hope it shouldnt be used in the presented screenshot, because quite frankly the definition [2] of emblem-* would not quilify for anything in the UI. If it is used there, then this really should be changed to something more suitable.
Eitherway the icon is missing in oxygen even though it is part of the proposed spec, I'll talk to upstream about doing something about this :)

[1] http://standards.freedesktop.org/icon-naming-spec/icon-naming-spec-latest.html
[2] Due to lack of proper description in the proposed fdo spec: http://live.gnome.org/GnomeArt/Tutorials/IconThemes#Stock_Icons