xorg-x11安装过程中出现错误，无法继续安装！

hayse2000

老电脑用minicd2008安装，装基本的系统没有出现差错，并且系统能正常启动，但是继续安装xorg-x11的时候，出现以下错误：
[33;01m*[0m QA Notice: USE Flag 'amd64-fbsd' not in IUSE for media-libs/mesa-7.0.3
>>> Unpacking source...
>>> Unpacking MesaLib-7.0.3.tar.bz2 to /var/tmp/portage/media-libs/mesa-7.0.3/work
[32;01m*[0m Removing DO_DEBUG defs in dri drivers...
>>> Source unpacked.
>>> Compiling source in /var/tmp/portage/media-libs/mesa-7.0.3/work/Mesa-7.0.3 ...
(cd configs && rm -f current && ln -s linux-dri-x86 current)
make default
make[1]: Entering directory `/var/tmp/portage/media-libs/mesa-7.0.3/work/Mesa-7.0.3'
make[2]: Entering directory `/var/tmp/portage/media-libs/mesa-7.0.3/work/Mesa-7.0.3/src'
../configs/current:27: *** missing separator.  Stop.
make[2]: Leaving directory `/var/tmp/portage/media-libs/mesa-7.0.3/work/Mesa-7.0.3/src'
make[1]: *** [default] Error 1
make[1]: Leaving directory `/var/tmp/portage/media-libs/mesa-7.0.3/work/Mesa-7.0.3'
make: *** [linux-dri-x86] Error 2
[31;01m*[0m
[31;01m*[0m ERROR: media-libs/mesa-7.0.3 failed.
[31;01m*[0m Call stack:
[31;01m*[0m               ebuild.sh, line   49:  Called src_compile
[31;01m*[0m             environment, line 2700:  Called die
[31;01m*[0m The specific snippet of code:
[31;01m*[0m       emake -j1 ${CONFIG} || die "Build failed"
[31;01m*[0m  The die message:
[31;01m*[0m   Build failed
[31;01m*[0m
[31;01m*[0m If you need support, post the topmost build error, and the call stack if relevant.
[31;01m*[0m A complete build log is located at '/var/tmp/portage/media-libs/mesa-7.0.3/temp/build.log'.
[31;01m*[0m The ebuild environment file is located at '/var/tmp/portage/media-libs/mesa-7.0.3/temp/environment'.
[31;01m*[0m

无法继续安装，
已经20天左右，期间自己emerge --sync，并且更新了portage。还是一样！请问是否其他地方出错了？

另外反映个关于论坛的问题：论坛在输入新话题的时候，输入框显示不正常，但在编辑的时候又正常了。
系统用windows xp 浏览器用ie6的！