jit.window white flash

hello mailing list,

i have a problem with jit.window.
i have a few presets for size and position, but when i switch between
a small size and a bigger one there is a white flash.
this also happen when you resize the window manually as a white line
on the side of the window
as i need this size and position changes for dance performance this
flash is really not nice
i tried with noaccel 0 and 1, it doesn't change anything

i use max 4.5.5 and jitter 1.5.2 with osx 10.4.6

any ideas ?

thanks

yoann