previous animation is 8bit
If I recall correctly it looked fine ingame for my newer version... meh.
EDIT: nevermind, it has the white in electricity and all my frames are 32bit. I'll save all frames again to 8bit. I'm glad I still have them all !
EDIT II: 8bit doesn't work out, there's a huge black square...

24 bit doesn't work at all either, the black square is a white square.