This issue has been bugging me for a while now. I suppose it's more appropriate for the main SE site, but I want to know how others feel about it.
I find it very annoying that the 'active questions' thread gets cluttered with older posts that received minor edits: LaTeX formatting, fixed grammar, a few words changed, and especially, retagging. There are a few prolific editors on this site; nothing wrong with that, but their edits are pushing recent answers off the main page.
I feel that new or substantially improved answers deserve to remain visible on the main page as long as possible, and they shouldn't get mixed with older posts that haven't changed significantly.
A related problem is that the 'active' thread doesn't show any information about when the question was posted, or what has changed: you have to click on the question to see how old it is, and whether someone posted a new answer or whether it was just a retag or a small edit. I find that frustrating, and a waste of time.
Now, I understand that any change shouldn't go unnoticed. So my suggestion would be to split the 'active' thread in two: one 'active questions' thread for new questions, new answers, major edits (say, e.g. more than 50 characters altered), and perhaps also new comments, which currently don't bump questions. In addition, there could be a new 'edited questions' thread that keeps track of retagging and minor edits.
Anyway, I'd like to know what the rest of you think.