Microwave/Convection Oven Danger?

[Baldicon]

I just read a thread on a SOB forum, where folks are finding heat damage behind the microwave/convection oven. Has anyone on here heard of anything similar on Montana's? The thread included pictures of burn/scorch marks on the wall behind the mw/cv, and one with melted wallpaper on the back of the mv/cv. I doubt there is a risk just using the mw, but we use the cv quit a bit. I guess it boils down (no pun intended) to whether it was installed with heat shielding and or air gap.