What happened to reply 4 in the forums?
lol, I guess we just don't like #4. I checked about 20 articles, and they all go 1,2,3,5.... Weirdest bug ever!
It's not a bug, it's a feature! The answer seems obvious to me.
I've been lurking around ever since the upgrade, and this is the first time that I've logged in. You regulars probably login all of the time, so you'd never know why this is happening.
When you are not logged in, reply #4 is always an advertisement. When you are logged in, you don't see the advertisements. However, it appears that the ad is a placeholder, and therefore the next reply is #5.
Hope this helps.