I had had simular blue sections and i solved it by increasing the  transparantie trace level . This can be done in the render options tab > User settings > check subrays > trace transperancy

By default VUE does look x many times true glass... increase that and you get better results (longer render time.

To test this:

Place a glass cube in front of camera, copy ith a few times behind it. At the third you will get blue sections, increase the trace level and you're ok again.