Ok Thanks!
So my naviserver db driver is using the wrong PG library and I'll track that down.
otool -L nsdbpg.so
nsdbpg.so:
/usr/local/ns/lib/libnsdb.dylib (compatibility version 0.0.0, current version 0.0.0)
/usr/lib/libpq.5.dylib (compatibility version 5.0.0, current version 5.5.0)
/usr/local/ns/lib/libnsthread.dylib (compatibility version 0.0.0, current version 0.0.0)
/usr/local/ns/lib/libnsd.dylib (compatibility version 0.0.0, current version 0.0.0)
/usr/local/ns/lib/libtcl8.5.dylib (compatibility version 8.5.0, current version 8.5.18)
/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1197.1.1)