title: Is there a workaround for Qt 4.4 visual artefacts on Mac OS X 10.6 (snow leopard)
body: <p>My software is written in Qt 4.4.2 using XCode on Mac OS X 10.5. It runs fine on Mac OS X 10.5. But when it is run on Mac OS X 10.6 it shows some strange visual artefacts when drawing the drop-down menus of QComboBoxes. Apparently it affects every QComboBox.</p>
  
  <p>4 people with Mac OS X 10.6 who have tried it have reported the same behaviour, so it isn't a quirk on one machine. Everything else apparently looks fine. </p>
  
  <p>The combo boxes function OK, but it doesn't look great. Aesthetics are important for commercial apps, especially on Mac OS X.</p>
  
  <p>Has anyone else seen this behaviour with Qt apps on Mac OS X 10.6? </p>
  
  <p>Is there a workaround?</p>