Hello Everybody

When using classes derived from QwtPlotTextLabel with QwtPlotRenderer I'm getting pixelated text, I think the cached copy is being used. The screenshot is of a print preview at 200%, the watermark and two bright labels are the objects that inherit QwtPlotTextLabel, no painter or draw functions have been overloaded.
Screenshot from 2013-06-11 21:27:31.jpg

Saving to PDF works as expected, all text is vector. I would like to get raster formats and print preview to display vector text (setting PDF output on the QPrinter/QPrintPreviewDialog doesn't help).

Is there a flag I can set to disable caching prior to calling QwtPlotRenderer?