Final Cut Express HD and Animoto resolutions don't match

I imported a 720p video into Final Cut Express HD from Animoto.com (created online with Animoto and downloaded the MP4).

I added a song and a couple of bookend credits then exported to QuickTime Movie. The resolution of the FC export is significantly lower than the original MP4. Significantly lower. I've tried almost all the export settings in the "QuickTime Conversion" export, but nothing comes close to the resolution of the imported MP4.

Can anyone see what I might be doing wrong?