i get that with several figures.  just dual core with xp and 1 gig.  so i set the shadow to render first so the shadow map is established in a file.  then i can render away, using reuse shadow maps.  no memory problems then.

maybe the problem with not deleting old textures can be solved by clicking the "reload texture map" button.  i haven't noticed that problem personally.

go that way really fast.
if something gets in your way
turn