New Gnome usually arrives in ::gentoo masked, that's how I notice.
I have a simple nightly cronjob like
$ cat /etc/cron.daily/09-eix-sync
#!/bin/sh
eix-sync -F -C --quiet 2>&1 | ansimail -s "$0" "$MAILTO"
We can see here gnome-base/gnome-shell-44_rc was added Mar 11.
But I have eix-sync/diff output from Mar 12 that doesn't list it.
Am I missing something obvious about eix defaults, or something else?