i got both flext and sc4pd from cvs yesterday. thx for the quick answer. off to learn how to do backtrace now.
i just came home and recompiled flext and sc4pd ... no segfault ...
which version of pd are you using? if you are using the msp tree, please try the devel tree ... it's just a guess, but maybe flext needs some of the threadlocks thomas introduced ...
backtrace with gdb: $ gdb pd (gdb) run -lib /path/to/sc4pd
after pd segfaults: (gdb) backtrace
cheers... tim