I tried installing the upstream openbox again, it still isn't linked against libxinerama.  See the output of ldd below on the upstream package (no libxinerama) and on the package I built with libxinerama-dev installed (libxinerama listed).  The upstream package still maximizes across two physical screens when using xinerama, instead of just one as it should.  Openbox is also unable to make intelligent window placement choices without this library.  Please rebuild the package with libxinerama support and push it upstream.  My version of the .deb can be found here for comparison: http://www.dvhart.com/~dvhart/openbox_3.2-7_i386.deb


Upstream package:
dvhart@farah:~$ ldd `which openbox`
        libXft.so.2 => /usr/lib/libXft.so.2 (0xb7fcb000)
        libfreetype.so.6 => /usr/lib/libfreetype.so.6 (0xb7f5e000)
        libfontconfig.so.1 => /usr/lib/libfontconfig.so.1 (0xb7f37000)
        libXrender.so.1 => /usr/lib/libXrender.so.1 (0xb7f2e000)
        libXrandr.so.2 => /usr/X11R6/lib/libXrandr.so.2 (0xb7f2a000)
        libXext.so.6 => /usr/X11R6/lib/libXext.so.6 (0xb7f1d000)
        libglib-2.0.so.0 => /usr/lib/libglib-2.0.so.0 (0xb7ea1000)
        libstartup-notification-1.so.0 => /usr/lib/libstartup-notification-1.so.0 (0xb7e98000)
        libSM.so.6 => /usr/X11R6/lib/libSM.so.6 (0xb7e8f000)
        libICE.so.6 => /usr/X11R6/lib/libICE.so.6 (0xb7e76000)
        libX11.so.6 => /usr/X11R6/lib/libX11.so.6 (0xb7db1000)
        libxml2.so.2 => /usr/lib/libxml2.so.2 (0xb7cb2000)
        libdl.so.2 => /lib/tls/i686/cmov/libdl.so.2 (0xb7caf000)
        libpthread.so.0 => /lib/tls/i686/cmov/libpthread.so.0 (0xb7c9f000)
        libz.so.1 => /usr/lib/libz.so.1 (0xb7c8e000)
        libm.so.6 => /lib/tls/i686/cmov/libm.so.6 (0xb7c6c000)
        libobrender.so.1 => /usr/lib/libobrender.so.1 (0xb7c5b000)
        libobparser.so.1 => /usr/lib/libobparser.so.1 (0xb7c57000)
        libc.so.6 => /lib/tls/i686/cmov/libc.so.6 (0xb7b2a000)
        libexpat.so.1 => /usr/lib/libexpat.so.1 (0xb7b0a000)
        /lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0xb7feb000)


My package:
dvhart@farah:~$ ldd `which openbox`
        libXft.so.2 => /usr/lib/libXft.so.2 (0xb7fcb000)
        libfreetype.so.6 => /usr/lib/libfreetype.so.6 (0xb7f5e000)
        libfontconfig.so.1 => /usr/lib/libfontconfig.so.1 (0xb7f37000)
        libXinerama.so.1 => /usr/X11R6/lib/libXinerama.so.1 (0xb7f33000)
        libXrender.so.1 => /usr/lib/libXrender.so.1 (0xb7f2b000)
        libXrandr.so.2 => /usr/X11R6/lib/libXrandr.so.2 (0xb7f27000)
        libXext.so.6 => /usr/X11R6/lib/libXext.so.6 (0xb7f1a000)
        libglib-2.0.so.0 => /usr/lib/libglib-2.0.so.0 (0xb7e9e000)
        libstartup-notification-1.so.0 => /usr/lib/libstartup-notification-1.so.0 (0xb7e95000)
        libSM.so.6 => /usr/X11R6/lib/libSM.so.6 (0xb7e8b000)
        libICE.so.6 => /usr/X11R6/lib/libICE.so.6 (0xb7e73000)
        libX11.so.6 => /usr/X11R6/lib/libX11.so.6 (0xb7dae000)
        libxml2.so.2 => /usr/lib/libxml2.so.2 (0xb7caf000)
        libdl.so.2 => /lib/tls/i686/cmov/libdl.so.2 (0xb7cac000)
        libpthread.so.0 => /lib/tls/i686/cmov/libpthread.so.0 (0xb7c9c000)
        libz.so.1 => /usr/lib/libz.so.1 (0xb7c8a000)
        libm.so.6 => /lib/tls/i686/cmov/libm.so.6 (0xb7c69000)
        libobrender.so.1 => /usr/lib/libobrender.so.1 (0xb7c58000)
        libobparser.so.1 => /usr/lib/libobparser.so.1 (0xb7c54000)
        libc.so.6 => /lib/tls/i686/cmov/libc.so.6 (0xb7b27000)
        libexpat.so.1 => /usr/lib/libexpat.so.1 (0xb7b07000)
        /lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0xb7feb000)