The ebuild for metacity-setup-doesn't apply the metacity-setup-0.7.1-themedir.patch. Output from the build is as follows: * Working directory: /var/tmp/portage/metacity-setup-0.7.1-r1/work/metacity-0.7.1... * Cannot apply any patch, running libtoolize... and, sure enough, callbacks.c isn't patched.
Patching happens before that message. Are you sure it doesn't patch ? If metacity setup shows any themes it is patched.
closing. reopen if it really isn't patched.