diff --git a/activity.go b/activity.go
index fd09760..7ffc15a 100644
--- a/activity.go
+++ b/activity.go
@@ -678,6 +678,7 @@ func xonkxonk(user *WhatAbout, item junk.Junk, origin string) *Honk {
 					xonk.Onts = append(xonk.Onts, name)
 				}
 			}
+			xonk.Onts = oneofakind(xonk.Onts)
 		}
 		if originate(xid) != origin {
 			log.Printf("original sin: %s <> %s", xid, origin)
@@ -853,8 +854,7 @@ func jonkjonk(user *WhatAbout, h *Honk) (junk.Junk, junk.Junk) {
 			t["href"] = m.where
 			tags = append(tags, t)
 		}
-		ooo := ontologies(h.Noise)
-		for _, o := range ooo {
+		for _, o := range h.Onts {
 			t := junk.New()
 			t["type"] = "Hashtag"
 			o = strings.ToLower(o)
diff --git a/honk.go b/honk.go
index 0ce7b75..5f3acf3 100644
--- a/honk.go
+++ b/honk.go
@@ -669,6 +669,9 @@ func thelistingoftheontologies(w http.ResponseWriter, r *http.Request) {
 		}
 		onts = append(onts, []string{o, o[1:]})
 	}
+	if u == nil {
+		w.Header().Set("Cache-Control", "max-age=300")
+	}
 	templinfo := getInfo(r)
 	templinfo["Onts"] = onts
 	err = readviews.Execute(w, "onts.html", templinfo)
@@ -1309,10 +1312,10 @@ func savehonk(w http.ResponseWriter, r *http.Request) {
 		}
 		return
 	}
-	onts := ontologies(honk.Noise)
+	honk.Onts = oneofakind(ontologies(honk.Noise))
 	res, err := stmtSaveHonk.Exec(userinfo.UserID, what, honk.Honker, xid, rid,
 		dt.Format(dbtimeformat), "", aud, honk.Noise, convoy, whofore, "html",
-		honk.Precis, honk.Oonker, 0, strings.Join(onts, " "))
+		honk.Precis, honk.Oonker, 0, strings.Join(honk.Onts, " "))
 	if err != nil {
 		log.Printf("error saving honk: %s", err)
 		http.Error(w, "something bad happened while saving", http.StatusInternalServerError)
@@ -1327,7 +1330,7 @@ func savehonk(w http.ResponseWriter, r *http.Request) {
 			return
 		}
 	}
-	for _, o := range onts {
+	for _, o := range honk.Onts {
 		_, err = stmtSaveOnts.Exec(strings.ToLower(o), honk.ID)
 		if err != nil {
 			log.Printf("error saving ont: %s", err)
diff --git a/upgradedb.go b/upgradedb.go
index ba953e3..6296b42 100644
--- a/upgradedb.go
+++ b/upgradedb.go
@@ -146,7 +146,7 @@ func upgradedb() {
 			onts := ontologies(noise)
 			mo := re_more.FindAllString(noise, -1)
 			for _, o := range mo {
-				onts = append(onts, "#" + o[7:])
+				onts = append(onts, "#"+o[7:])
 			}
 			if len(onts) > 0 {
 				ontmap[honkid] = oneofakind(onts)