the problem with pd extended and avast is not a specific windows problem. It is a problem or a) of the heuristics used by avast; b) or the file published at the mirror of sourceforge where I downloaded it from.
And please, the audience of this list is not so stupid, at least to the point of not knowing it is possible run pure data with linux, and not to have this kind of problem. I really think the authors of pd-extended want to know if there is a problem with the file that they published at sourceforge.
Now, i can run pd only turning avast off.
bye, andrei