[tzs]

What does "showdead" say in your settings (click on your username in the orange bar to get to settings)? It should be "no" if you have not changed it.

You can test it on the comments on this submission: https://news.ycombinator.com/item?id=11213213

There are several dead comments near the bottom that are visible if showdead is "yes", and invisible if it is "no".

[lmitchell]

Ohh, are 'dead' comments different from ones that have just been downvoted into mostly-grayness? In that case I don't actually see them, I just see undead comments :) thanks for clarifying