On Qt 4.6.x / Carbon ( using sdk 10,4u, i did not tested using recent carbon sdk ) if we try to write complexe characters like ê and then press a random character, then an extra e is added in the input fields, ie if i write "êt" i got "êet".
The problem seem to appear in all input widgets ( textedit, lineedit etc ).
The problem does not appear using the same Qt version using cocoa.
I'm using a french keyboard layout.