How to embed QTextBrowser in QGraphiscView with its background being transparent?

Hi,

how can I make the background of the embedded QTextBrowser widget (which is embedded in a QGraphicsProxyWidget, of course) transparent? Note that methods like setAutoFillBackground(false) called on either the widget itself or the proxy widget won't do anything... Also, CSS transparency, i.e. background-color:rgba(0,0,0,0); won't work either. I'm looking for approved solutions :(

I'm using QT 4.8.2, Windows 7 32/64-bit.

Cheers!

Seems to be solvable only via bugs (at first I didn't want to consider this possibility... but well. See here!