aspecti ratio on .mov and mpeg 4 are different

the .mov file looks like it's 720 across. People look fat (?) They look better in mpeg 4 which looks the be 320 x 240. How can I change the "export to quicktime" which gives this 720 .mov format?

Oh David, why didn't I think of that ;=)

Thanks for your usual sage advice.

And DH, you have answered a question I've had for a long time... 640x480 - the square pixel equivalent of 720x480 rectangular pixels. Thanks,

DD