Window controls: minimise and maximise icons are confusing?

[chombee at lavabit.com]

Hey, just a thought:

On Lucid, after I've maximised a window and I then want to unmaximise it I
keep finding myself pressing the minimise button instead. I think it's
because of the icons: minimise is a down arrow and maximise is an up
arrow, which suggests that minimise is the reverse of maximise, but it
isn't, the reverse of maximise is unmaximise.