Kde

~ $ ACCEPT_KEYWORDS=~x86 emerge kscreensaver -pv

These are the packages that I would merge, in order:

Calculating dependencies ...done!
[blocks B     ] =kde-base/kdebase-3.5* (is blocking kde-base/kscreensaver-3.5.1)
[ebuild  N    ] kde-base/kscreensaver-3.5.1  +arts -debug -kdeenablefinal -kdexdeltas +opengl -xinerama 0 kB

Total size of downloads: 0 kB
~ $ epm -q kdebase
kdebase-3.5.1-r3
~ $