I just reviewed this suggested edit, and while doing so, I noticed that the Improve Edit and Reject and Edit buttons were absent; only Approve and Reject were there. I haven't been suspended from editing - the edit link still appears under all posts, and I've never done anything bad as far as I know. The edited post wasn't a tag wiki, and I don't have permission to approve edits there anyway.

What happened there? Under what circumstances do those two buttons not appear?