anyone else having this discoloration?

[Attaboy]

popped the hood this morning and noticed circular discolorations on the plastic battery and brake fluid covers. coincidentally, they line up to holes in the hood frame. the spots dont wash off.. its almost like there was some sort of out-gassing from the holes in the hood that caused the plastic to discolor.

i've had this car since mid april.. 3000 miles and this just now started happening. i'm not fired up and pissed off about it.. i dont really care for the chintzy plastic covers anyway... just wondering if anyone else has this issue and also what might be causing it.