When the "Hide Hot Network Questions" preference is enabled (i.e. HNQ sidebar is hidden), we see "Recent Tags" and "Recent Badges" in the homepage instead of the HNQ.
However, the "Recent Badges" list is displayed with no margins.
I think that the appropriate margins were set in the past.
cf.) Where did the hot network questions go? Are they gone forever, or is this just A/B testing?