I have on a few occasions wanted to rollback other people's posts after suggested edits have been approved when they shouldn't have. For example; two hours ago I edited the title of a question just seconds after coleopterist had made all kinds of edits to it, and, because it was approved, all edits to the actual question was overwritten. If I could, I'd rollback to coleopterist's version.
When do you get to rollback other people's posts? Or, is that kind of action restricted to moderators?