In Chrome, FF, and IE (all for Windows), I noticed the CSS line-height for some comments gets changed to 40px. The following statement is having some unintended consequences.
#comments li .oneline .commentBody {
line-height: 40px;
}
The problem is that there can be nested lists in online divs. So every sub-comment ends getting a 40px line height in its commentBody. I believe what you really want to do is the following. That would give the 40px line height ONLY to the comment in the online div and not sub-comments.
#comments li .oneline > div > .commentBody
For an example, look at the following comment.
http://tech.slashdot.org/comments.pl?sid=2019050&cid=35356484
This is a huge annoyance when reading comments on slashdot, and severely degrades the experience. The same problem occurs with the moderation score selector, which is
#comments li .oneline .score
and should be something like
#comments li .oneline > div > .commentTop .score
With such an easy fix, I hope this can be applied soon.