I'm having a weird flicker effect.
My video is made out of several AVIs which were originally flashes which were originally images.
At the last third of each AVI segment, the two frames/pictures next to each other flicker for a bit a couple of times.

This only happens when I set a custom resolution and "Desktop" editing at the new project screen.
Does it have anything to do with the options there? I think it does.

Can anyone help?
Thanks

PS:I'm kind of inexperienced with Premiere, so it could be that
EDIT: I'm using Premiere CS3