can't see samba shares in kde network folders view

[xanas3712]

I can see them on one gentoo machine, but not on the other. Both machines have the same configuration, same kernel, etc. The only difference is the machine that doesn't work was primarily installed using emerge -K with packages built on the other machine.

emerge -p kdebase-kioslaves produces nothing other than the ebuild, so I don't think any dependencies are missing there. What could be missing?