[emerge gnome fails due to webkit-gtk and app-arch/pax failure]

See also http://forums.funtoo.org/index.php?/topic/210-failed-to-emerge-net-libswebkit-gtk-244-r200-error-404-not-found/

[Failed to emerge net-libs/webkit-gtk-2.4.4-r200 ..... ERROR 404: Not Found]

No problem. For what it's worth, setting up the 2.4.4-r1 ebuild in a local overlay (I used the instructions at http://www.funtoo.org/Git_local_overlay) seems to be working:

1. Follow the wiki instructions until it starts talking about rain-slick (the blue text).
2. Create /usr/local/portage/net-libs/webkit-gtk/files/
3. Copy the original ebuild from /usr/portage/net-libs/webkit-gtk/webkit-gtk-2.4.4.ebuild to your local overlay at /usr/local/portage/net-libs/webkit-gtk/webkit-gtk-2.4.4-r1.ebuild
4. Copy the original ebuild files in /usr/portage/net-libs/webkit-gtk/files to your local overlay at /usr/local/portage/net-libs/webkit-gtk/files
5. Fix the SRC_URI var in the ebuild by adding an 'a' before the '.tar.xz': 

   SRC_URI="http://www.webkitgtk.org/releases/${MY_P}a.tar.xz"

6. Create the Manifest file

   $ ebuild webkit-gtk-2.4.4-r1.ebuild digest

Now when you emerge webkit-gtk, it should pull from your local overlay with the fixed SRC_URI.

[Failed to emerge net-libs/webkit-gtk-2.4.4-r200 ..... ERROR 404: Not Found]

I had the same problem. Created a bug: https://bugs.funtoo.org/browse/FL-1612