Starting up Pd-0.39.2-extended-RC1 gives this error:
error: to function, this needs to be compiled against Pd 0.40 or higher, or a version that has sys_register_loader()
It is the build from http://autobuild.puredata.info/auto-build/2007-03-28/. The testing platform is a Macbook Dual Core (not the dual 2 core, or what ever the newer one is called) running Mac OS 10.4.9.
The objects delread/delwrite and sqrt don't work as with test7. See  for details which still accounts. It has been mentioned that cd~ also don't work. I have not tested that.