Hello Frank,
performing ldd /usr/../pd-gui, I get:
ldd /usr/local/lib/pd/bin/pd-gui
linux-gate.so.1 => (0xffffe000)
libtk8.4.so.0 => /usr/lib/libtk8.4.so.0 (0xb7c95000)
libtcl8.4.so.0 => /usr/lib/libtcl8.4.so.0 (0xb7be0000)
librt.so.1 => /lib/tls/i686/cmov/librt.so.1 (0xb7bd6000)
libjack-0.100.0.so.0 => /usr/lib/libjack-0.100.0.so.0 (0xb7bbd000)
libc.so.6 => /lib/tls/i686/cmov/libc.so.6 (0xb7a7c000)
libvos3gcc3.so => not found
libvcl680li.so => not found
libsot680li.so => not
found
libutl680li.so => not found
libtl680li.so => not found
libcomphelp4gcc3.so => not found
libuno_cppuhelpergcc3.so.3 => not found
libuno_cppu.so.3 => not found
libuno_sal.so.3 => not found
libX11.so.6 => /usr/lib/libX11.so.6 (0xb7989000)
libdl.so.2 => /lib/tls/i686/cmov/libdl.so.2 (0xb7985000)
libpthread.so.0 => /lib/tls/i686/cmov/libpthread.so.0 (0xb796e000)
libstlport.so.5.1 => /usr/lib/libstlport.so.5.1 (0xb78d4000)
libstdc++.so.6 =>
/usr/lib/libstdc++.so.6 (0xb77e9000)
libm.so.6 => /lib/tls/i686/cmov/libm.so.6 (0xb77c2000)
libgcc_s.so.1 => /lib/libgcc_s.so.1 (0xb77b6000)
/lib/ld-linux.so.2 (0xb7eff000)
libXau.so.6 => /usr/lib/libXau.so.6 (0xb77b3000)
libXdmcp.so.6 => /usr/lib/libXdmcp.so.6 (0xb77ae000)
many thanks!
Ruth