I have NVidia 9800GT, graphics driver version 180.51 64bit, GPU in game temp. 60 deg. Celzius. PS verzion 4.0.3 64bit.

Just make sure library files installed with the PS package are used by ld.so . Path to /opt/PlaneShift/libs (or other apropriate, e.g. I'm using /usr/local/games/PlaneShift/libs) should be either in /etc/ld.so.conf or in LD_LIBRARY_PATH. So that ldd command returns something like this. No "(not found)" should be seen in the output.

~$ ldd /usr/local/games/PlaneShift/psclient.bin
   linux-vdso.so.1 =>  (0x00007fff573ff000)
   libCgGL.so => /usr/local/games/PlaneShift/libs/libCgGL.so (0x00007f434f1b4000)
   libCg.so => /usr/local/games/PlaneShift/libs/libCg.so (0x00007f434ebb5000)
   libXxf86vm.so.1 => /usr/lib64/libXxf86vm.so.1 (0x00007f434e9b0000)
   libopenal.so.0 => /usr/local/games/PlaneShift/libs/libopenal.so.0 (0x00007f434e774000)
   libfreetype.so.6 => /usr/local/games/PlaneShift/libs/libfreetype.so.6 (0x00007f434e4e4000)
   libpng12.so.0 => /usr/local/games/PlaneShift/libs/libpng12.so.0 (0x00007f434e2bf000)
   libGL.so.1 => /usr/lib64/libGL.so.1 (0x00007f434e0cd000)
   libX11.so.6 => /usr/local/games/PlaneShift/libs/libX11.so.6 (0x00007f434ddc4000)
   libmng.so.1 => /usr/local/games/PlaneShift/libs/libmng.so.1 (0x00007f434db55000)
   libjpeg.so.62 => /usr/local/games/PlaneShift/libs/libjpeg.so.62 (0x00007f434d933000)
   libvorbisfile.so.3 => /usr/local/games/PlaneShift/libs/libvorbisfile.so.3 (0x00007f434d72b000)
   libspeex.so.1 => /usr/local/games/PlaneShift/libs/libspeex.so.1 (0x00007f434d510000)
   libogg.so.0 => /usr/lib64/libogg.so.0 (0x00007f434d30b000)
   libasound.so.2 => /usr/lib64/libasound.so.2 (0x00007f434d02f000)
   libz.so.1 => /usr/lib64/libz.so.1 (0x00007f434ce14000)
   libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f434cbf9000)
   libdl.so.2 => /lib64/libdl.so.2 (0x00007f434c9f5000)
   libstdc++.so.6 => /usr/local/games/PlaneShift/libs/libstdc++.so.6 (0x00007f434c6f2000)
   libm.so.6 => /lib64/libm.so.6 (0x00007f434c471000)
   libc.so.6 => /lib64/libc.so.6 (0x00007f434c114000)
   /lib64/ld-linux-x86-64.so.2 (0x00007f434f120000)
   libXext.so.6 => /usr/local/games/PlaneShift/libs/libXext.so.6 (0x0000003473e00000)
   libGLcore.so.1 => /usr/lib64/libGLcore.so.1 (0x00007f434ae2a000)
   libnvidia-tls.so.1 => /usr/lib64/tls/libnvidia-tls.so.1 (0x00007f434ad28000)
   libXau.so.6 => /usr/lib64/libXau.so.6 (0x00007f434ab26000)
   libXdmcp.so.6 => /usr/lib64/libXdmcp.so.6 (0x00007f434a921000)
   libvorbis.so.0 => /usr/local/games/PlaneShift/libs/libvorbis.so.0 (0x00007f434a6f5000)
   librt.so.1 => /lib64/librt.so.1 (0x00007f434a4ec000)
   libgcc_s.so.1 => /usr/lib64/libgcc_s.so.1 (0x00007f434a2df000)