Holy crap! Do you have the ignitor and ballast mounted near where the damage is? And how could it not be your HID install causing the damage, guy? Occam's razor.
The lack of embelisher rings which was the fix for the scratches on the housing would not cause what the OP's photos show. My guess is someone did work back there and damaged/scratched the area.There was an issue with the 05's to where the sun light would be amplified through the convex lens on the top light. As shown by your second image where the sticker on the body is being magnified. However the actual light housing would have to have taken damage as well. There was a recall done on the 05's to have a little ring installed around that lens to catch the light.
What does the light housing look like?