I think default row height of array ctrl should be bigger. In gridctrl it is Draw::GetStdFontCy() + 5 (and header height is row height + 2). But I'm not sure if they're exactely the same values as in xp or vista. Current height of arrayctrl row is clearly too small (for example edit controls are flattened a little bit - see build menu in the ide).
Eh, actually, I was addressing KDE issues, do you too?