i hate that the proportions of the characters change when you redraw em for a new scene in flash, a way to fix that is making a character model of it, calculating the sizes of every little thing... so how to calculate the height of the character if its a drawing? comparing it to its head. i use basic shapes alot. i calculate how tall its going to be by drawing cicrles, or "heads" vertically. Normal humans are usually 6 or 7 heads tall. more toon-esque guys are most of the time 4 or 3 heads tall...
im saying all this because those proportion problems happened to me in the pico's school the movie flashes, so now that im redoing it all over, i want to keep the characters consistent, unlike in the first movie.i did a quick character model sheet thing for pico, so now i know how tall hell be in the rest of the movies:

he is 4 heads tall, his body is almost 2 heads and his pants are a bit more than 1 head. His legs look kinda short since his pants are supossedly lower than his waist, but its still enough for a sexy running sequence :)
This image means PSTM is in the works :P also, sorry for the quality, i got no scanner, and i inverted it becasue the lines look clearer.