So now I have this "Alice in Wonderland" hole in my wall, well on one side anyway.Could be the heat/cold thing, warm inside and cold outside. Could be expansion/contraction of the plaster. Could be that the glass was just too old and frail for this use, as the manufacturer never expected these things to be plastered into walls. Regardless, I now have to come up with a fix. Thinking, thinking, thinking...
