emacs frames behavior

[Charlie Zender]

hi,

once upon a time, until about 6 mos. - 1 yr. ago,
each emacs frame i opened behaved like a sub-process
of a single emacs process, e.g., if the same buffer
were displayed in multiple frames then editing that
buffer simultaneously updated all the frames.
now, though, when i open multiple frames in emacs,
the frames do not seem to know what's going on in the
other frames. i have not changed how i start emacs
at all. i like the old behavior better. anyone know
how to recover it?

gracias,
charlie
-- 
Charlie Zender, Department of Earth System Science
University of California, Irvine (949) 891-2429 :)