Tim please have a look at the fftw implementation. The pvoc example crashes with a segmentation fault when fftw is enabled.
works fine for me ... the only problem, i'm aware of at the moment is a segfault related to the garray locks... (iirc, when closing a patch, possibly related to the gui changes from 37 to 38)
would it be possible, that you send be a gdb backtrace?
cheers ... tim