GIMP doesn't remember window/dock/toolbar setup on start

Submitted by Scott

Description

When I start GIMP it resets to what seems like a default toolbar setup. I maximise the window, remove the left panel that says "You can drop dockable dialogs here" and widen the dock on the right. It looks like this: http://i.imgur.com/eCHld.jpg

But next time I start GIMP it reverts to this: http://i.imgur.com/l8wXX.jpg

The option "Save window positions on exit" is ticked.

I have a multi-monitor setup (laptop with widescreen monitor plugged in) but I'm not sure if that would really affect things, at least not the toolbar being shrunk down.

Version: 2.8.0