The help says:

"Do not use the function to set, for example, the geometry; reimplementing this function do provide a back-door through which the appearance of a widget can be changed, but with Qt 4.0's style engine there is rarely necessary to implement this function; reimplement the drawItemPixmap(), drawItemText(), drawPrimitive(), etc. instead."

"reimplementing this function do" should be "reimplementing this function does".

"Qt 4.0's style engine there is rarely" should be "Qt 4.0's style engine it is rarely".

Also should the semi-colons be replaced by full stops?