Hans, I'm sorry to say that Pd-0.43.1-double-20111007-macosx106-x86_64.dmg is again a single precision build. If I build from the pd-double.git sources, an i386 build with 32 bit float precision is the default output. This may be so because I am on OSX 10.5.
I've pushed a change to pd-double.git, to display the precision message at start up with log level 2 instead of 3, so the message won't go unnoticed.
Katja