The animations were not rendered with fields, I’ve been using Flash to create the animations from scratch, and am exporting (from flash) .png sequences, and unchecking the box that says “interlaced.” The project is rasterized when I export the .png sequences (I WISH Premiere was vector-based, wouldn’t that be a sight?)
I also wish that I used adobe after effects instead, it’s a real fun program (I used to do animations using AE rather than Flash) however using Flash eliminates a lot of extra steps since I’d have to create the graphics in photoshop, illustrator, etc. It’s too late to do the whole thing over in after effects.
I’m finally pleased with how the final .flv files have turned out. It’s a pain to export them twice rather than once (once from Premiere to quicktime, and then from quicktime through the encoder to .flv), but it’s worth the quality.