I couldn't find the post you were talking about (I was really hoping you could provide a link). Instead, I found a thread filled with people talking about how you have to be careful with your mining rigs because "Any electric appliance can catch fire." [1]

Bitcoin mining isn't a great example; if you look further into that thread, it's not just AMD users whose rigs have caught fire in the bitcoin mining situation.

1: https://bitcointalk.org/index.php?topic=1776853.0