These are the packages that would be merged, in order:

Calculating world dependencies  ..... ..... ..... ...... done!
[ebuild     U ] www-client/epiphany-2.18.2 [2.16.3] USE="doc python spell%* -debug -xulrunner%" 0 kB 
[ebuild     U ] gnome-extra/fast-user-switch-applet-2.18.0 [2.16.0] USE="-debug" 0 kB 
[ebuild  N    ] www-client/seamonkey-1.1.4  USE="crypt gnome ldap -debug -ipv6 -java -mozdevelop -moznocompose -moznoirc -moznomail -moznopango -moznoroaming -postgres -xforms -xinerama -xprint" 0 kB 
[ebuild     U ] gnome-extra/yelp-2.18.1 [2.16.2] USE="beagle* -debug -xulrunner%" 0 kB 
[ebuild     U ] app-arch/file-roller-2.18.4 [2.16.3] USE="gnome -debug" 0 kB 
[ebuild     U ] dev-python/gnome-python-extras-2.14.2-r1 [2.14.2] USE="X doc firefox seamonkey -debug -xulrunner%" 0 kB 
[ebuild     U ] app-text/evince-0.8.3 [0.6.1-r3] USE="dbus djvu doc dvi gnome t1lib tiff -debug" 0 kB 
[ebuild     U ] gnome-extra/gnome-screensaver-2.18.2-r1 [2.16.2-r1] USE="doc opengl pam xinerama -debug" 0 kB 
[ebuild     U ] gnome-extra/bug-buddy-2.18.1 [2.16.1] USE="-debug" 0 kB 
[ebuild     U ] gnome-extra/evolution-webcal-2.10.0 [2.8.0] USE="-debug" 0 kB 
[ebuild     U ] gnome-base/gnome-applets-2.18.0-r2 [2.16.2-r1] USE="acpi apm doc%* gnome%* gstreamer hal -debug -ipv6" 0 kB 
[ebuild     U ] gnome-extra/gnome-power-manager-2.18.3 [2.16.3] USE="doc -debug (-libnotify%*)" 0 kB 
[ebuild     U ] x11-misc/alacarte-0.11.3-r1 [0.10.2] USE="-debug" 0 kB 
[ebuild     U ] mail-client/evolution-2.10.2 [2.8.3-r2] USE="bogofilter crypt dbus doc hal kerberos krb4 ldap mono nntp pda profile spell ssl -debug -ipv6" 0 kB 
[ebuild     U ] app-admin/sabayon-2.18.1 [2.12.4] USE="-debug" 0 kB 
[ebuild     U ] gnome-base/gnome-session-2.18.3 [2.16.3] USE="branding esd tcpd -debug -ipv6" 0 kB 
[ebuild   R   ] media-video/totem-2.18.2  USE="a52 dvd ffmpeg flac gnome hal lirc mad mpeg nsplugin ogg seamonkey theora vorbis xv -debug -nvtv -xulrunner*" 0 kB 
[ebuild     U ] dev-python/gnome-python-desktop-2.18.0 [2.16.0] USE="X doc -debug" 0 kB 
[ebuild     U ] gnome-extra/gnome-games-2.18.2.1 [2.16.3] USE="artworkextra guile opengl%* -debug" 0 kB 
[ebuild     U ] gnome-extra/deskbar-applet-2.18.1 [2.16.2-r1] USE="eds spell -debug" 0 kB 
[ebuild     U ] app-editors/gedit-2.18.1-r1 [2.16.2-r1] USE="doc python spell -debug" 0 kB 
[ebuild     U ] gnome-base/gnome-2.18.2-r1 [2.16.3] USE="cdr cups dvdr ldap -accessibility -mono% (-hal%*)" 0 kB 

Total: 22 packages (20 upgrades, 1 new, 1 reinstall), Size of downloads: 0 kB