Hi Vincent,
By the way, I got several examples of disappearing pyext boxes on windoz machines (it seems that Gem and pyext don't cohabitate that well).
i would be very interested in more detailed info how and why GEM and pyext don't cohabitate well. Vanishing object boxes have in all cases i got to know of been caused by version mismatches of PD or flext headers and libraries and have been resolved by downloading or checking out an up-to-date flext version and recompiling flext and the objects.
best greetings, Thomas