sputnik

re-emerge pango, it hit everybody.  Your desktop will be back.

What's wrong with this picture?
I don't know how you could have gotten a "menu entry" for the "new kernel", boot-update CANNOT find an entry in boot.conf to match a kernel called  vmlinuz-4.2.0-gentoo-r1, so it doesn't know what to do with it.
Ditto.

The only thing that grabs me is you don't want NetworkManager and dhcpcd both.  If you're using NetworkManager delete dhcpcd from rc.  Otherwise more or less what I have, don't know about the busybox stuff, did you add that?  I don't have it.  Here's mine:
# rc-update NetworkManager | default acpid | default alsasound | boot autofs | default bluetooth | default bootmisc | boot chronyd | default consolekit | default cups-browsed | default cupsd | default dbus | default devfs | sysinit device-mapper | boot distccd | default dmesg | sysinit fcron | default fsck | boot fuse | default gpm | default hddtemp | default hdparm | default hostname | boot hwclock | boot ip6tables | default ipset | default iptables | default keymaps | boot killprocs | shutdown kmod-static-nodes | sysinit lm_sensors | default local | default localmount | boot lvm | boot metalog | default microcode_ctl | boot modules | boot mount-ro | shutdown mtab | boot netif.lo | sysinit netmount | default nfs | default nfsmount | default openvpn.client | default postfix | default preload | default procfs | boot qemu-binfmt | default root | boot samba | default savecache | shutdown sshd | default swap | boot swapfiles | boot sysctl | boot sysfs | sysinit termencoding | boot tmpfiles.dev | sysinit tmpfiles.setup | boot udev | sysinit udev-mount | sysinit udev-postmount | boot default urandom | boot xdm | default

Well that seems to be the magic.  Just cleaned out my hosts file, commented out all those aliases in /etc/conf.d/hostname, reboot, and perfect.  Indeed those warnings in the host were leftover from before, not there on this write.
Hopefully we'll get a new bug feature to keep us entertained soon.
Once again you've helped me so I didn't have to use my brain.  Thank you.

Try using USE="-sound"
$ eix stellarium [I] sci-astronomy/stellarium Available versions: 0.12.4^t{tbz2} **0.13.1^t {debug nls sound stars LINGUAS="af ak am ar as ast az be bg bn bo br bs ca cs cy da de el en en_CA en_GB en_US eo es et eu fa fi fil fr ga gd gl gu he hi hr hu hy ia id is it ja ka kk kn ko ky la lb lo lt lv mk ml mn mr ms mt nan nb nl nn oc pa pl pt pt_BR ro ru se si sk sl sq sr sv sw ta te tg th tl tr tt uk uz vi zh zh_CN zh_HK zh_TW zu"} Installed versions: 0.12.4^t{tbz2}(07:12:41 AM 04/14/2014)(nls -debug -sound -stars LINGUAS="en_US -af -ak -am -ar -as -ast -az -be -bg -bn -bo -br -bs -ca -cs -cy -da -de -el -en -en_CA -en_GB -eo -es -et -eu -fa -fi -fil -fr -ga -gd -gl -gu -he -hi -hr -hu -hy -ia -id -is -it -ja -ka -kk -kn -ko -ky -la -lb -lo -lt -lv -mk -ml -mn -mr -ms -mt -nan -nb -nl -nn -oc -pa -pl -pt -pt_BR -ro -ru -se -si -sk -sl -sq -sr -sv -sw -ta -te -tg -th -tl -tr -tt -uk -uz -vi -zh -zh_CN -zh_HK -zh_TW -zu") Homepage: http://www.stellarium.org/ Description: 3D photo-realistic skies in real time

Yeah, it's a bit cryptic.  It wants it like this
eselect java-nsplugin set 64bit blah Blah being the name or number of what you want to use.
 

I don't use luks, but I'm guessing it's the fstab it's having trouble with, have you considered using UUID's or labels?  Most recommend that anyway.
I do use LVM but in fstab I use labels.

http://bugs.funtoo.org/browse/FL-1278

It seems the answer is today I got an update (and of course, had to update package.license as well) for googletalk plugin, it's now at 5.4.2.0.  So possibly in the transition the old version wasn't available, I recommend trying today.  Your accept license = "*" should be good for everything.
Also, ahem, it could be handy to use a U.S. proxy address.

I have those flags, but as drobbins says, I believe they are only a gentoo thing, not needed here and I should remove them.  But zero issues because of them.
I think it's likely you need to do python-updater, painless and at the very least you'll rule out any problem there.