But scroll down. As you scroll down, the line of minus signs grows. When you are 6 comments deep into a conversation (where each comment is a reply to the last. The comments are all indented to the right), there is a line of 6 minus signs at the top left (------).
If you click on the second minus sign on the left, it collapses the conversation up to that parent without having to scroll up to that level.
Yes, I am aware of the issue (see my recent comment on one of the parent comments).
I am afraid that it is an issue with the way some browsers render the CSS sticky position. If you have any CSS knowledge, I would greatly appreciate your input!
If you click on the second minus sign on the left, it collapses the conversation up to that parent without having to scroll up to that level.