When using Introjucer's GUI Editor I've noticed that it sets two colours for every label component explicitly, even if I've not changed/set them:
label->setColour (TextEditor::textColourId, Colours::black); label->setColour (TextEditor::backgroundColourId, Colour (0x00000000));
So later these labels will ignore any look-and-feel settings/changes. Bug or feature? :)
Sliders, combo boxes, buttons, toggle buttons, text editors seem to work as I would expect them to.
Latest revision (d7d662bb3853a105daf48a87f5aec1d12e1b2f10) was used to reproduce.