SnakeBite,
Are there any other houses nearby that would possibly have a mirror or some shiny object inside their house that would be reflecting the suns rays back thru a window that would cause a magnifying glass effect? Or perhaps some water in a pool or bird bath reflecting the sun? Because the shutter is also warping, but not the siding behind the shutter, it would appear to me that an external heat like magnified sun rays are causing the vinyl to warp.
