Apparent texture corruption with non-power-of-two textures

Strange graphics texture corruption on a 2011 MacBook air with an intel Sandy Bridge (i7) chip and onboard GPU.

Reproduce by building and running quick3d/master against qt4.7.4/4.8rc2/4.8, and running the solarsystem_qml demo. The sun and planet both exhibit texture corruption, whereas the moon is uncorrupted.

To fix the planet texture corruption, you can resize the planet.jpg texture from 480x320 to 1024x512 (the same size as the moon texture), and then it renders uncorrupted.

Running the qglinfo utility the GPU claims to support GL_ARB_texture_non_power_of_two, but there is clearly some implementation issue.