Scrap the comment above, it appears that libqt5webkit5-qmlwebkitplugin 5.0.1-0ubuntu1 (from the raring archives) doesn’t have all the patches that 5.0.1 in the qt5-proper PPA has (in particular it’s missing add_experimentalDevicePixelRatio.patch).
Scrap the comment above, it appears that libqt5webkit5- qmlwebkitplugin 5.0.1-0ubuntu1 (from the raring archives) doesn’t have all the patches that 5.0.1 in the qt5-proper PPA has (in particular it’s missing add_experimenta lDevicePixelRat io.patch) .