Hi!
Current ~amd64 tree says - see below. My steps?
-------------------------------------------------------
emerge -pvDuN world
These are the packages that would be merged, in order:
Calculating dependencies... done!
[ebuild U ] net-firewall/iptables-1.4.3.1 [1.4.2-r2] USE="(-l7filter%)" 422
kB
[ebuild U ] x11-libs/pixman-0.14.0-r1 [0.14.0] USE="mmx sse2 (-altivec)
-debug (-sse%*)" 0 kB
[ebuild R ] dev-cpp/gtkmm-2.14.3 USE="-debug -doc -examples -test
(-accessibility%*)" 0 kB
[ebuild R ] media-video/mplayer-1.0_rc2_p20090322 USE="X a52 aac aalib
alsa amrnb amrwb ass cddb cdio
cdparanoia dirac dts dv dvb dvd dvdnav enca encode faac faad gif iconv jack
jpeg ladspa lirc live mad mmx mp2
mp3 nemesi network opengl oss png pulseaudio quicktime rar real rtc
schroedinger sdl speex sse sse2 ssse3
theora tremor truetype unicode vorbis x264 xscreensaver xv xvid -3dnow
-3dnowext (-altivec) -arts -bidi -
bindist -bl -cpudetection -custom-cflags -custom-cpuopts -debug -dga -directfb
-doc -dxr3 -esd -fbcon -ftp -
ggi -gtk -ipv6 -joystick -libcaca -lzo -md5sum -mmxext -mng -musepack -nas
-openal -pnm -pvr -radio -samba (-
svga) -teletext -tga -v4l -v4l2 -vdpau (-vidix) (-win32codecs) -xanim -xinerama
-xvmc* -zoran" VIDEO_CARDS="-
mga -nvidia -s3virge -tdfx -vesa" 0 kB
Total: 4 packages (2 upgrades, 2 reinstalls), Size of downloads: 422 kB
!!! Multiple package instances within a single package slot have been pulled
!!! into the dependency graph, resulting in a slot conflict:
dev-cpp/gtkmm:2.4
('ebuild', '/', 'dev-cpp/gtkmm-2.14.3', 'merge') pulled in by
dev-cpp/gtkmm:2.4 required by world
>=dev-cpp/gtkmm-2.4 required by ('installed', '/',
'dev-cpp/gconfmm-2.24.0', 'nomerge')
>=dev-cpp/gtkmm-2.10.0 required by ('installed', '/',
'media-gfx/inkscape-0.46-r5', 'nomerge')
(and 9 more)
('installed', '/', 'dev-cpp/gtkmm-2.14.3', 'nomerge') pulled in by
>=dev-cpp/gtkmm-2.12.3[accessibility] required by ('installed', '/',
'media-sound/ardour-2.7.1',
'nomerge')
(and 12 more)
Explanation:
New USE for 'dev-cpp/gtkmm:2.4' are incorrectly set. In order to solve
this, adjust USE to satisfy '>=dev-cpp/gtkmm-2.12.3[accessibility]'.