When I have several tabs open, it's almost impossible to know which one is the active tab for the window I am actually working with. There is a very slight tone difference where the active tab is a tiny bit lighter. This should be much more obvious, as several times I've closed the wrong tab, a very easy error with the current interface. Please consider including this feature in a future upgrade, making the tone of the active tab several steps lighter, for example.

Thanks!

Gary