Bugzilla Bug 169049

Tested on a couple of boxes, games-fps/alienarena should be keyworded amd64..

post emerge --info please

kyle@localhost ~ $ emerge --info
Portage 2.1.2-r12 (default-linux/amd64/2006.1/desktop, gcc-4.1.2, glibc-2.5-r0,
2.6.20-git14 x86_64)
=================================================================
System uname: 2.6.20-git14 x86_64 AMD Athlon(tm) 64 Processor 3500+
Gentoo Base System release 1.12.9
Timestamp of tree: Thu, 01 Mar 2007 21:30:01 +0000
dev-lang/python:     2.4.4
dev-python/pycrypto: 2.0.1-r5
sys-apps/sandbox:    1.2.18.1
sys-devel/autoconf:  2.13, 2.61
sys-devel/automake:  1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.9.6-r2, 1.10
sys-devel/binutils:  2.17
sys-devel/gcc-config: 1.3.14
sys-devel/libtool:   1.5.23b
virtual/os-headers:  2.6.20-r1
ACCEPT_KEYWORDS="amd64 ~amd64"
AUTOCLEAN="yes"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-march=athlon64 -O2 -ftree-vectorize -msse3 -pipe"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/kde/3.5/env /usr/kde/3.5/share/config
/usr/kde/3.5/shutdown /usr/share/X11/xkb /usr/share/config"
CONFIG_PROTECT_MASK="/etc/env.d /etc/gconf /etc/revdep-rebuild /etc/terminfo"
CXXFLAGS="-march=athlon64 -O2 -msse3 -pipe"
DISTDIR="/distfiles"
FEATURES="autoconfig distlocks metadata-transfer parallel-fetch sandbox sfperms
strict"
GENTOO_MIRRORS="http://distfiles.gentoo.org
http://distro.ibiblio.org/pub/linux/distributions/gentoo"
LINGUAS="en"
MAKEOPTS="-j5"
PKGDIR="/usr/portage/packages"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress
--force --whole-file --delete --delete-after --stats --timeout=180
--exclude=/distfiles --exclude=/local --exclude=/packages
--filter=H_**/files/digest-* --prune-empty-dirs"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY="/usr/local/overlays/kports"
SYNC="rsync://rsync.gentoo.org/gentoo-portage"
USE="X acpi alsa amd64 ao audiofile bash-completion bitmap-fonts bzip2 cairo
cdb cddb cdinstall cdparanoia cdr cli cups curl dvd dvdread encode exif fam
ffmpeg firefox flac fortran ftp gif ginac glut gtk gtk2 iconv imagemagick imlib
isdnlog javascript jpeg lcms ldap libg++ lm_sensors lua mad memlimit midi
mikmod mmap mp3 mpeg mplayer msql mssql ncurses nls nptl nptlonly nsplugin
offensive ogg openal opengl oss pam pcre pdf perl png ppds pppd python readline
reflection ruby sdl session speex spell spl ssl svg symlink tcpd truetype
truetype-fonts type1-fonts unicode usb vcd videos vim-syntax vorbis xml xorg xv
xvid zlib" ALSA_CARDS="emu10k1" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix
dshare dsnoop empty extplug file hooks iec958 ioplug ladspa lfloat linear meter
mulaw multi null plug rate route share shm softvol" ELIBC="glibc"
INPUT_DEVICES="keyboard mouse" KERNEL="linux" LCD_DEVICES="bayrad cfontz
cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LINGUAS="en"
USERLAND="GNU" VIDEO_CARDS="nv nvidia"
Unset:  CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LANG, LC_ALL, LDFLAGS,
PORTAGE_RSYNC_EXTRA_OPTS

Works for me as well.

Portage 2.1.2-r13 (default-linux/amd64/2006.1/desktop, gcc-4.1.2, glibc-2.5-r0,
2.6.20-gentoo x86_64)
=================================================================
System uname: 2.6.20-gentoo x86_64 AMD Athlon(tm) 64 X2 Dual Core Processor
3800+
Gentoo Base System release 1.12.9
Timestamp of tree: Fri, 02 Mar 2007 17:50:01 +0000
distcc 2.18.3 x86_64-pc-linux-gnu (protocols 1 and 2) (default port 3632)
[disabled]
dev-java/java-config: 1.3.7, 2.0.31-r3
dev-lang/python:     2.4.4
dev-python/pycrypto: 2.0.1-r5
sys-apps/sandbox:    1.2.17
sys-devel/autoconf:  2.13, 2.61
sys-devel/automake:  1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6-r2, 1.10
sys-devel/binutils:  2.17
sys-devel/gcc-config: 1.3.14
sys-devel/libtool:   1.5.23b
virtual/os-headers:  2.6.20
ACCEPT_KEYWORDS="amd64 ~amd64"
AUTOCLEAN="yes"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-march=athlon64 -O2 -pipe"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/kde/3.5/env /usr/kde/3.5/share/config
/usr/kde/3.5/shutdown /usr/share/X11/xkb /usr/share/config"
CONFIG_PROTECT_MASK="/etc/env.d /etc/env.d/java/ /etc/gconf
/etc/java-config/vms/ /etc/revdep-rebuild /etc/terminfo /etc/texmf/web2c"
CXXFLAGS="-march=athlon64 -O2 -pipe"
DISTDIR="/usr/portage/distfiles"
FEATURES="autoconfig distlocks metadata-transfer parallel-fetch sandbox sfperms
strict"
GENTOO_MIRRORS="http://distfiles.gentoo.org
http://distro.ibiblio.org/pub/linux/distributions/gentoo"
LINGUAS="en_GB"
MAKEOPTS="-j3"
PKGDIR="/usr/portage/packages"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress
--force --whole-file --delete --delete-after --stats --timeout=180
--exclude=/distfiles --exclude=/local --exclude=/packages
--filter=H_**/files/digest-*"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY="/usr/local/portage"
SYNC="rsync://rsync.europe.gentoo.org/gentoo-portage"
USE="X aac alsa amd64 berkdb bitmap-fonts blender-game cairo cdinstall
cdparanoia cdr cdrom cli cracklib crypt cvs dbus deprecated divx dvd dvdr
dvdread eds emboss encode fam ffmpeg firefox fortran gdbm gif gmedia gphoto2
gpm graphviz gtk gtk2 hal history iconv imlib java jpeg kde libg++
libsamplerate live lm_sensors mad midi mikmod mjpeg mp3 mpeg ncurses nls nptl
nptlonly nsplugin nvidia ofx ogg openal opengl oss pam pcre perl png ppds pppd
python qt3 qt4 quicktime quotes readline realmedia reflection sdl session smp
spell spl sql ssl subversion svg tcpd theora threads threadsafe truetype
truetype-fonts type1-fonts unicode usb vorbis wmp x264 xcomposite xml xorg
xscreensaver xv xvid zlib" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem
bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel
intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci"
ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop empty extplug file
hooks iec958 ioplug ladspa lfloat linear meter mulaw multi null plug rate route
share shm softvol" ELIBC="glibc" INPUT_DEVICES="keyboard mouse joystick evdev"
KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001
mtxorb ncurses text" LINGUAS="en_GB" USERLAND="GNU" VIDEO_CARDS="nvidia"
Unset:  CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LANG, LC_ALL, LDFLAGS,
PORTAGE_RSYNC_EXTRA_OPTS

Thanks, done.