This bug was fixed in 6.0.3
Hello, does anybody on Mac OS X Mountain Lion has similar problem?
 Open Mix Console (way is not important - in project window, keyboard command or menu)
 Click on green button with + mark (maximize window)
[*] Mix Console disappear (to be clear it is regularly closed now)[/list]
EDIT: MixConsole must be in Always on Top mode.
I have tried this on multiple monitor configurations with same results.
Anybody can reproduce this?