Yikes! Has not happened to me - I am going check my QS8's as soon as I get home tonight!

Though I will admit I dropped my EP500 when I first received it as I was carrying it down to my basement. Thankfully it was still in it's shipping packaging so no harm done - though I did have that sick feeling until I unwrapped it to find it unscathed.

On-Wall M5HP LCR, QS8 & EP500 in 7.1