Shapes fail to remove their stroke after .setStyle({stroke: false})

[thatjpk]

It appears that if you create a shape and enable stroke (either when the shape is created, or later with .setStyle()), the stroke can't be turned back off.

If a shape is created with no stroke, it renders correctly (no stroke visible). If a shape created with no stroke, then later has it's stroke enabled with .setStyle({stroke: true}), it renders correctly (a stroke visible). But if you try to turn it back off with .setStyle({stroke: false}), it renders incorrectly (the stroke remains visible).

Here's a gist of a simple example that reproduces the problem: https://gist.github.com/1626238
Tested in Chromium 15 and Firefox 9, and both exhibited this behavior.

[mourner]

Confirmed, thanks for the report! Should be fairly easy to fix.