After upgrading to expat-2.0.0 the hald service failed to start correctly complaining about a missing library. After, even KDE would not start anymore because of the hald problem. Reverting to 1.95.8 solved this.
PoseidonGentooTest ~ # emerge --info Portage 2.1_pre7-r3 (default-linux/amd64/2006.0, gcc-3.4.6, glibc-2.4-r1, 2.6.16-gentoo x86_64) ================================================================= System uname: 2.6.16-gentoo x86_64 AMD Athlon(tm) 64 Processor 3500+ Gentoo Base System version 1.12.0_pre16 ccache version 2.4 [enabled] dev-lang/python: 2.3.5-r2, 2.4.2-r1 sys-apps/sandbox: 1.2.17 sys-devel/autoconf: 2.13, 2.59-r7 sys-devel/automake: 1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6-r2 sys-devel/binutils: 2.16.1-r2 sys-devel/libtool: 1.5.22 virtual/os-headers: 2.6.11-r3 ACCEPT_KEYWORDS="amd64 ~amd64" AUTOCLEAN="yes" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-O3 -march=athlon64 -mtune=athlon64 -fforce-addr -momit-leaf-frame-pointer -fomit-frame-pointer -ftracer -pipe" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/kde/2/share/config /usr/kde/3.5/env /usr/kde/3.5/share/config /usr/kde/3.5/shutdown /usr/kde/3/share/config /usr/share/X11/xkb /usr/share/config /var/qmail/control" CONFIG_PROTECT_MASK="/etc/gconf /etc/revdep-rebuild /etc/splash /etc/terminfo /etc/texmf/web2c /etc/env.d" CXXFLAGS="-O3 -march=athlon64 -mtune=athlon64 -fforce-addr -momit-leaf-frame-pointer -fomit-frame-pointer -ftracer -pipe -fvisibility-inlines-hidden" DISTDIR="/usr/portage/distfiles" FEATURES="autoconfig candy ccache distlocks metadata-transfer sandbox sfperms strict" GENTOO_MIRRORS="ftp://192.168.1.200/gentoo" LINGUAS="nl" MAKEOPTS="-j2" PKGDIR="/usr/portage/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/usr/local/portage" SYNC="rsync://192.168.1.200/gentoo-portage" USE="amd64 X a52 aac acpi alsa apache apache2 arts artswrappersuid avi bash-completion berkdb bitmap-fonts browserplugin bzip2 cairo cli crypt ctype cups curl dba doc dri dvd dvdr eds emboss encode exif expat fastbuild flac fltk font-server foomaticdb force-cgi-redirect fortran ftp gd gdbm gif gphoto2 gpm gstreamer hal idn ieee1394 imlib insecure-savers ipv6 isdnlog ithreads java javascript jpeg jpeg2k kde kdeenablefinal kdepim lcms lm_sensors logitech-mouse lzw lzw-tiff mad memlimit mng motif mozcalendar mozilla mozsvg mp3 mpeg ncurses nls nptl nptlonly nsplugin offensive ogg openexr opengl pam pcre pdflib perl png posix pppd profile python qt quicktime rdesktop readline samba scanner sdl session simplexml soap sockets speex spell spl ssl tcpd tetex theora tiff tokenizer truetype truetype-fonts type1-fonts usb userlocales vcd vorbis xine xinerama xml xml2 xmms xpm xscreensaver xsl xv xvid xvmc zeroconf zlib elibc_glibc input_devices_keyboard input_devices_mouse input_devices_joystick kernel_linux linguas_nl userland_GNU video_cards_ati video_cards_fglrx video_cards_vesa video_cards_fbdev" Unset: ASFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, LANG, LC_ALL, LDFLAGS
You need to run revdep-rebuild, see the other bug. *** This bug has been marked as a duplicate of 128069 ***