I am facing one memory issue that Popup TitleWindow is not getting remove from memory. I checked in profile.
Also another thing i noticed that when i invoked addPopup() from sub-application, it does not get removed from memory. But when i invoke popup from main application it gets GCed.
on close handler i am doing removePopup and removing close event listener.
i did a small example test , just invoking mx:TitleWindow as popup. Subapplication system manager ( some where deep down ) holds the references of TitleWindow. but in main application it gets released immediately.
My subapplication are running in sibling application domain and are in trusted zone.
i am using 4.1 sdk and latest falsh player version 11.3.x.x on firefox.