with a recent i386 -snapshot installed, i just did a pkg_add -ui, and playing around with a few packages, i noticed:
xine:/usr/local/lib/xine/plugins/1.1.2/xineplug_decode_faad.so: /usr/local/lib/libfaad.so.0.0 : WARNING: symbol(err_msg) size mismatch, relink your program installed pkgs: faad-2.0p5 MPEG2 and MPEG-4 AAC decoder xine-lib-1.1.2p4 multimedia decoding library xine-ui-0.99.4p1 multimedia player for kicks, i did a forced reinstall of those 3 packages, ala -r -F installed; still the same issue. however, i didn't notice that before i did the reinstall, libfaad.so.0.0 was from a build on December 11, 2006, while xineplug_decode_faad.so was from a February build. (all via snapshot packages).