I just worked with the zen theme for the first
time and suddenly lost any ringtone, all ringtones
then tried just ringtone without vibrate and all was
okay. They should really let you know that vibrate & tone
don't work in that theme, EVER, not even the downloadable
themes or at least they haven't worked for me.
SO IF YOU ARE HAVING TROUBLES WITH RINGTONES & THEMES
try lots of different settings and for me it worked
to set it on ring only.....hope this helps a few
vd