Blinking Inferior Scheme buffer with Emacs 21.1

[Manuel Giraud]

Hi,
        I use to have an Emacs 21.1 frame running "Inferior Scheme" with
        guile on my desktop. Sometimes I can see chars blinking in
        this frame while I'm not doing anything.

        It seems to be Emacs related because while blinking the emacs
        process consumes some CPU.

        I'm using the default "jit lock" font lock support mode.

-- 
Jake:"See those berries? That's our breakfast! See that stream? That's
our drinking water!"
Daria:"See that skeleton? That's our future." 
-From "The Teachings Of Don Jake." 

_Manuel Giraud_