[TIMOB-1009] TiUIWindow::requiresNewActivity strange behaviour

Platform 1.3.0, Android 2.1

Please take a look at TiUIWindow::requiresNewActivity method, actually, I spent a lot of time trying to understand how OptionMenu works on Android (and why it doesn't work in most cases :). The question is why you only check existence of required properties but not boolean values of these properties? Is this code really make window "heavyweight"?

Titanium.UI.createWindow({fullscreen:false});

Since these 2 lines create same window (I checked how "fullscreen" property is used)

Titanium.UI.createWindow({});
Titanium.UI.createWindow({fullscreen:false});

why result is different?
Of course I understand, may be this is how it works now, but it's very confusing, and creates a lot of problems