Something

ewanm89-laptop% firefox 
No running windows found
/usr/lib64/mozilla-firefox/firefox-bin: error while loading shared libraries: libexpat.so.0: cannot open shared object file: No such file or directory
firefox-bin exited with non-zero status (127)

ewanm89-laptop% ls -l /usr/lib/libexpat*
-rw-r--r-- 1 root root 245732 2007-06-12 09:02 /usr/lib/libexpat.a
-rwxr-xr-x 1 root root    795 2007-06-12 09:02 /usr/lib/libexpat.la
lrwxrwxrwx 1 root root     17 2007-06-12 09:02 /usr/lib/libexpat.so -> libexpat.so.1.5.0
lrwxrwxrwx 1 root root     17 2007-06-12 09:02 /usr/lib/libexpat.so.1 -> libexpat.so.1.5.0
-rwxr-xr-x 1 root root 136776 2007-06-12 09:02 /usr/lib/libexpat.so.1.5.0


make[3]: Entering directory `/var/tmp/paludis/x11-libs/pango-1.16.3/work/pango-1.16.3/modules'
Writing a pango.modules file to use with tests/examples.
/var/tmp/paludis/x11-libs/pango-1.16.3/work/pango-1.16.3/pango/.libs/lt-pango-querymodules: error while loading shared libraries: libexpat.so.0: cannot open shared object file: No such file or directory
make[3]: *** [pango.modules] Error 127
make[3]: Leaving directory `/var/tmp/paludis/x11-libs/pango-1.16.3/work/pango-1.16.3/modules'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/var/tmp/paludis/x11-libs/pango-1.16.3/work/pango-1.16.3/modules'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/var/tmp/paludis/x11-libs/pango-1.16.3/work/pango-1.16.3'
make: *** [all] Error 2

!!! ERROR in x11-libs/pango-1.16.3:
!!! In gnome2_src_compile at line 2798
!!! compile failure

!!! Call stack:
!!!    * gnome2_src_compile (/var/tmp/paludis/x11-libs/pango-1.16.3/temp/loadsaveenv:2798)
!!!    * src_compile (/var/tmp/paludis/x11-libs/pango-1.16.3/temp/loadsaveenv:3574)
!!!    * ebuild_f_compile (/usr/libexec/paludis/src_compile.bash:51)
!!!    * ebuild_main (/usr/libexec/paludis/ebuild.bash:363)
!!!    * main (/usr/libexec/paludis/ebuild.bash:381)

die trap: exiting with error.

Install error:
  * In program paludis -i amarok claws-mail:
    * When performing install action from command line:
      * When executing install task:
        * When installing 'x11-libs/pango-1.16.3':
	  * Install error: Install failed for 'x11-libs/pango-1.16.3::gentoo'