QComboBox lost its USER property

[Szombathelyi György]

Thiago Macieira írta:
> Szombathelyi Gyorgy wrote:
>> In the qt-copy change
>> http://websvn.kde.org/trunk/qt-copy/src/gui/widgets/qcombobox.h?rev=5915
>> 39&r1=575649&r2=591539
>>
>> the QComboBox class lost its USER property. Is it a wanted thing or not?
>> (If it is, then KConfigDialogManager need to be adjusted).
> 
> The change came from Trolltech, so it's intended.
> 

But why? Doesn't this change break backwards compatibility?