Comment 4 for bug 990867

I'm going to undupe for the moment but can't re-mark as new. I somewhat mistakenly marked as invalid without fully exploring why it isn't an issue here.

I believe & can duplicate at will that this is caused by the animations plugin, With it enabled then bug as described.

With it disabled then it no longer occurs, any min'ed window restored after spread is fine
(can supply short vid's demonstrating with & without the animations plugin enabled

The reason here for having it disabled is believe it can lead to an 'out of the blue' performance breakdown, often seen by a break in smooth scrolling in gedit, nautilus, ect. & other area's