Wrong text color when using font.underline and horizontalAlignment in Text element using opengl rendering

From Bugzilla Radakovic Bojan:

Error is triggered in application by setting font.underline to true. But,
setting only font.underline of Text element to true is not enough to observe
error after application start up- it seams that at least horizontalAlignment of
Text element needs to be set. Otherwise, error will be visible only after
couple of changes of font.underline property.

Attached application can be compiled and run on device independently (./simpleblacktext)
or qml/simpleblacktext/main.qml can be invoked in qmlviewer like this:

qmlviewer -opengl qml/simpleblacktext/main.qml

Notice that if -opengl parameter is ommited, application will be rendered
correctly in qmlviewer!

Idea (and initial code) for bare test app I got from colleague who noticed
similar behavior on his N8. So, it looks like that problem is somewhere in Qt,
and not in OpenGL/OpenVG driver (to be confirmed once we run same test app on
some Symbian device)

All of this leads me to conclusion that we have problem with font rendering
when OpenGl is involved.