It would appear that in the text (of only GiGi components?) there are artifacts in the last row of pixels. They are always the same for each individual character (at least, once you run the program, haven't check to see if it changes between runs). Below are some samples.
http://loudmouth.javamonger.org/freeorion/fonts1.pnghttp://loudmouth.javamonger.org/freeorion/fonts2.pnghttp://loudmouth.javamonger.org/freeorion/fonts3.png


EDIT: I guess BB doesn't like png files?
In the interest of (my) time, here are my dependencies. If you need more specific info, please ask. I'm running Gentoo with a mix of stable & unstable flags. I get the same problem when using other fonts (e.g., system fonts).
Code:
home/daniel/proj/freeorion/FreeOrion/build
(daniel@loudmouth)$ ldd freeorion
linux-vdso.so.1 => (0x00007fff553c2000)
libGiGi.so => /home/daniel/local/freeorion-dev/lib/libGiGi.so (0x00007f7c3f965000)
libGiGiOgre.so => /home/daniel/local/freeorion-dev/lib/libGiGiOgre.so (0x00007f7c3f747000)
libopenal.so.1 => /usr/lib64/libopenal.so.1 (0x00007f7c3f4fc000)
libalut.so.0 => /usr/lib64/libalut.so.0 (0x00007f7c3f2f4000)
libOgreMain.so.1.7.3 => /usr/lib64/libOgreMain.so.1.7.3 (0x00007f7c3eb2e000)
libogg.so.0 => /usr/lib64/libogg.so.0 (0x00007f7c3e927000)
libvorbis.so.0 => /usr/lib64/libvorbis.so.0 (0x00007f7c3e6fa000)
libvorbisfile.so.3 => /usr/lib64/libvorbisfile.so.3 (0x00007f7c3e4f1000)
libBulletDynamics.so.2.78 => /usr/lib64/libBulletDynamics.so.2.78 (0x00007f7c3e28f000)
libBulletCollision.so.2.78 => /usr/lib64/libBulletCollision.so.2.78 (0x00007f7c3dfa7000)
libLinearMath.so.2.78 => /usr/lib64/libLinearMath.so.2.78 (0x00007f7c3dd8b000)
libz.so.1 => /lib64/libz.so.1 (0x00007f7c3db73000)
libboost_date_time-mt-1_47.so.1.47.0 => /usr/lib64/libboost_date_time-mt-1_47.so.1.47.0 (0x00007f7c3d95f000)
libboost_filesystem-mt-1_47.so.1.47.0 => /usr/lib64/libboost_filesystem-mt-1_47.so.1.47.0 (0x00007f7c3d73c000)
libboost_serialization-mt-1_47.so.1.47.0 => /usr/lib64/libboost_serialization-mt-1_47.so.1.47.0 (0x00007f7c3d4c4000)
libboost_signals-mt-1_47.so.1.47.0 => /usr/lib64/libboost_signals-mt-1_47.so.1.47.0 (0x00007f7c3d2ad000)
libboost_system-mt-1_47.so.1.47.0 => /usr/lib64/libboost_system-mt-1_47.so.1.47.0 (0x00007f7c3d0a9000)
libboost_thread-mt-1_47.so.1.47.0 => /usr/lib64/libboost_thread-mt-1_47.so.1.47.0 (0x00007f7c3ce8a000)
libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f7c3cc6d000)
librt.so.1 => /lib64/librt.so.1 (0x00007f7c3ca64000)
libstdc++.so.6 => /usr/lib/gcc/x86_64-pc-linux-gnu/4.6.1/libstdc++.so.6 (0x00007f7c3c756000)
libm.so.6 => /lib64/libm.so.6 (0x00007f7c3c4d4000)
libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x00007f7c3c2bd000)
libc.so.6 => /lib64/libc.so.6 (0x00007f7c3bf55000)
libGLU.so.1 => /usr/lib64/libGLU.so.1 (0x00007f7c3bce1000)
libGL.so.1 => /usr/lib64/opengl/nvidia/lib/libGL.so.1 (0x00007f7c3b9cf000)
libSM.so.6 => /usr/lib64/libSM.so.6 (0x00007f7c3b7c6000)
libICE.so.6 => /usr/lib64/libICE.so.6 (0x00007f7c3b5a9000)
libX11.so.6 => /usr/lib64/libX11.so.6 (0x00007f7c3b26b000)
libXext.so.6 => /usr/lib64/libXext.so.6 (0x00007f7c3b058000)
libfreetype.so.6 => /usr/lib64/libfreetype.so.6 (0x00007f7c3adbb000)
libjpeg.so.8 => /usr/lib64/libjpeg.so.8 (0x00007f7c3ab80000)
libpng15.so.15 => /usr/lib64/libpng15.so.15 (0x00007f7c3a952000)
libtiff.so.3 => /usr/lib64/libtiff.so.3 (0x00007f7c3a6ec000)
libdl.so.2 => /lib64/libdl.so.2 (0x00007f7c3a4e8000)
libXt.so.6 => /usr/lib64/libXt.so.6 (0x00007f7c3a283000)
libXaw.so.7 => /usr/lib64/libXaw.so.7 (0x00007f7c3a011000)
libfreeimage.so.3 => /usr/lib64/libfreeimage.so.3 (0x00007f7c39cd2000)
libzzip-0.so.13 => /usr/lib64/libzzip-0.so.13 (0x00007f7c39aca000)
/lib64/ld-linux-x86-64.so.2 (0x00007f7c4184f000)
libnvidia-tls.so.285.05.09 => /usr/lib64/opengl/nvidia/lib/libnvidia-tls.so.285.05.09 (0x00007f7c398c7000)
libnvidia-glcore.so.285.05.09 => /usr/lib64/libnvidia-glcore.so.285.05.09 (0x00007f7c37686000)
libuuid.so.1 => /lib64/libuuid.so.1 (0x00007f7c37481000)
libxcb.so.1 => /usr/lib64/libxcb.so.1 (0x00007f7c37262000)
libbz2.so.1 => /lib64/libbz2.so.1 (0x00007f7c37052000)
libjbig.so => /usr/lib64/libjbig.so (0x00007f7c36e46000)
libXmu.so.6 => /usr/lib64/libXmu.so.6 (0x00007f7c36c2c000)
libXpm.so.4 => /usr/lib64/libXpm.so.4 (0x00007f7c36a1a000)
libIlmImf.so.6 => /usr/lib64/libIlmImf.so.6 (0x00007f7c36741000)
libHalf.so.6 => /usr/lib64/libHalf.so.6 (0x00007f7c364fe000)
libIex.so.6 => /usr/lib64/libIex.so.6 (0x00007f7c362de000)
libmng.so.1 => /usr/lib64/libmng.so.1 (0x00007f7c3606a000)
libopenjpeg.so.1.4 => /usr/lib64/libopenjpeg.so.1.4 (0x00007f7c35e4a000)
libXau.so.6 => /usr/lib64/libXau.so.6 (0x00007f7c35c46000)
libXdmcp.so.6 => /usr/lib64/libXdmcp.so.6 (0x00007f7c35a40000)
libIlmThread.so.6 => /usr/lib64/libIlmThread.so.6 (0x00007f7c35838000)
liblcms.so.1 => /usr/lib64/liblcms.so.1 (0x00007f7c355fe000)
freetype was built with the following flags:
Code:
media-libs/freetype-2.4.6 USE="X bzip2 doc fontforge static-libs -auto-hinter -bindist -debug -utils"