Jigsaw + Graphics: sometimes gets stuck on re-creating a Window

[Doug Blank]

Sometimes when using the block:

win = Graphics.Window(500, 500)

Jigsaw just sits there... no tracing, just showing the red stop, with flapping butterfly.

(Laura has a video she will link to here shortly)

[Doug Blank]

Video capturing the issue: http://www.youtube.com/watch?v=groURwt6EYk

(happens twice, at about 1/3 and 2/3 through)

[Doug Blank]

Can't replicate.