trying to emerge banshee stops with:

there are no ebuilds to satisfy ">=x11-libs/gtk+-3.12:3".

1. emerge --search gtk+
   Searching...
   [ Results for search key : gtk+ ]
   [ Applications found : 2 ]

• x11-libs/gtk+
  Latest version available: 3.8.7
  Latest version installed: 3.8.7
  Size of files: 13,522 kB
  Homepage: http://www.gtk.org/
  Description: Gimp ToolKit +
  License: LGPL-2+

• x11-libs/gtk+extra
  Latest version available: 3.0.5
  Latest version installed: [ Not Installed ]
  Size of files: 1,431 kB
  Homepage: http://gtkextra.sourceforge.net
  Description: Useful Additional GTK+ widgets
  License: FDL-1.1 LGPL-2

Seemingly can't install anything newer than 3.8.7....So what, no banshee?

I'm new to Funtoo/Gentoo so maybe I'm missing something, but was told to fill out this bug report from guys on the IRC...