New Gentoo install - why does main menu not have icons?

[Mark Knecht]

I've just done a complete Gentoo install from scratch. The machine is
up and running (I'm using it now) and XFCE looks good so far but one
thing I notice is that the main XFCE menu on the bottom left doesn't
have any icons associated with about 1/2 of the items. (Specifically
Settings, accessories, Development, Multimedia and System)

Is there some package the Gentoo devs have made optional that might
fill all that in?

I've not seen this on my other machines which also have either Gnome,
KDE or both. This machine has neither and shows the problem.

Thanks,
Mark