When a user uses the Alt+Tab combination to move between Netbeans and another application and then uses Alt+Tab to go 
back to netbeans often the selection in the code editor window is lost and the control with the focus is the file menu. 

I understand that when a user presses the Alt key in Netbeans it selects the file menu but in other applications the 
selection will always go back to the editor if the user Alt+Tabs away from the application and then Alt+Tabs back.

It seems that if the user lifts up the Alt key before Tab then when they Alt+Tab back the focus is on the file menu. 
This is quite annoying as if the file menu has the focus and the user starts typing all kinds of things can happen.