So, today, I made a Apollo-style Mun mission in Sandbox, just for fun. The mission went flawless but that's not the interesting part. On reentry, I noticed an orange temperature gauge pointing to the heat shield. Here's a pic of that:
(sorry for the large size)
I used KER to check wich part has critical temperature, and apparently, it was the heat shield This is just too funny. A heat shield overheating. Think about it. Oh, and apparently there's another heat shield floating in a eccentric solar orbit