Window redraws

Hi,

Occasionally, when I start up my image (on Squeak 3.8), the
environment seems to go through a process of progressively (and
slowly!) redrawing every window that was open when the image was
saved. I've discovered that I can avoid the thirty+-second wait that
it takes for this process to complete by resizing the VM window a few
times.

Has anyone got any idea what could be going on?

Cheers,

Patrick