Bug#422933: Icon 'drawer' not found

[strazer]

If I add a new drawer, the warning message immediately appears and the 
drawer gets a yellow, diamond-shaped icon with a black border and a 
question mark in the middle.

If I manually assign another icon to the drawer, the warning message 
disappears. It seems that just the default icon for the drawer is 
somehow missing.

There is no gnome-panel-drawer.png on my system and I can find no 
package in the database that contains this file so no, assigning that 
path results in the same warning sign icon.

I'm using Testing, by the way.