On the touchscreen responsiveness, intitially
I thought it seemed under-responsive as well,
but i was trying to operate it using more of the
'pad' of my finger and probably too much pressure.
I switched to using the very tip of my finger,
mostly fingernail, with a quick light tap. Hasn't
missed a beat at all. i can't comment on your
menu problems, is this occuring after you've
customized it?