Hi' I'm working in ProAnimator 7 and I three object in front of each other. Object 1 is in front and have a glass material with refraction at 1.15. The second object is a plane object with a texture that have an alpha channel on it. The third object in the back have a texture with nothing special.
The problem is the alpha channel on object 2 show make a hole on the third object because of the refraction on the object 1. Is that clear? I'm not the best in English so I hope it's clear enough ;p
Try switching your renderer in the Output Panel from the Invigorator Renderer to the Ray Trace Renderer and you should have no problems with the refraction. Hope this helps. If you are still running into any problems, please let me know.