however, if this _is_ the problem, just renaming .d_fat to .pd_darwin
should fix it (and bugger hans to remain compatible with pd-vanilla :-))
(i'm pretty sure that on 0.40 you already should have support for .d_fat)
i just found out (with hans by my side), that Pd-extended indeed does
not load .d_fat externals.
you have to rename your external to .pd_darwin