Comment 24 for bug 387828

At the very least, the preview should show the ratio of the minimised window as a box (Otto, comment #22). But really a representation of the window needs cacheing before it is destroyed. Bear in mind that if the user alt-tabs past that minimised window even for a second then it *is* going to be raised anyway and redrawn at that point, then scaled, then... (all of which has considerably higher-latency).

On the icon-scaling front, I don't think the huge icons help much. The huge icons are too big to be useful, and the small corner icons are too _small_ to be quickly visibly useful; but either way they also should be drawn from the show and not a rescaling of a fixed bitmap rendering (Minimising Firefox still shows this).