I've made the necessary changes to libpd, mostly a matter of adding lots of sys_lock() and sys_unlock() calls, and made a pull request out of it on github.

In doing that I found several remaining problens with Pd's instance/threading code which I hopefully have fixed.

I added -DPDINSTANCE to the makefile in libpd/samples/c/pdtest_multi ; for things to work one has to invoke "make ADDITIONAL_CFLAGS=-DPDINSTANCE" to build pdlib.so (this is done from the makefile in pdtest_multi but if libpd is already compiled otherwise it's necessary to clean and remake).

The other test I tried (libpd/samples/c/pdtest) appears still to work whether or not libpd is compiled with PDINSTANCE defined.

As before comments warmly welcomed :)

cheers Miller