diff --git a/src/taoensso/timbre.clj b/src/taoensso/timbre.clj
index 0bffb4d..76ef569 100644
--- a/src/taoensso/timbre.clj
+++ b/src/taoensso/timbre.clj
@@ -174,7 +174,7 @@
           (let [timers (atom {})] ; {:hash last-appended-time-msecs ...}
             (fn [{ns :ns [x1 & _] :args :as apfn-args}]
               (let [now    (System/currentTimeMillis)
-                    hash   (str ns "/" x1)
+                    hash   (str ns "/" x1) ; TODO Alternatives?
                     limit? (fn [last-msecs]
                              (and last-msecs (<= (- now last-msecs)
                                                  limit-per-msecs)))]
diff --git a/src/taoensso/timbre/appenders/postal.clj b/src/taoensso/timbre/appenders/postal.clj
index dfcc7bc..a51136e 100644
--- a/src/taoensso/timbre/appenders/postal.clj
+++ b/src/taoensso/timbre/appenders/postal.clj
@@ -17,6 +17,7 @@
            (let [[subject & body] args]
              (postal/send-message
               (assoc postal-config
+                ;; TODO Better to just use trunc'd message as subject?
                 :subject (str prefix " - " (or subject throwable))
                 :body    (str (str/join \space body)
-                              (timbre/stacktrace throwable "\n")))))))})
\ No newline at end of file
+                              (timbre/stacktrace throwable "\n")))))))})
diff --git a/src/taoensso/timbre/utils.clj b/src/taoensso/timbre/utils.clj
index 6a66180..9c34adf 100644
--- a/src/taoensso/timbre/utils.clj
+++ b/src/taoensso/timbre/utils.clj
@@ -13,13 +13,13 @@
 (defn memoize-ttl
   "Like `memoize` but invalidates the cache for a set of arguments after TTL
   msecs has elapsed."
-  [ttl f]
+  [ttl-ms f]
   (let [cache (atom {})]
     (fn [& args]
       (let [{:keys [time-cached d-result]} (@cache args)
             now (System/currentTimeMillis)]
 
-        (if (and time-cached (< (- now time-cached) ttl))
+        (if (and time-cached (< (- now time-cached) ttl-ms))
           @d-result
           (let [d-result (delay (apply f args))]
             (swap! cache assoc args {:time-cached now :d-result d-result})
@@ -63,4 +63,4 @@
      ~name
      (keyword (str ~*ns*) (clojure.core/name ~name))))
 
-(comment (map #(fq-keyword %) ["foo" :foo :foo/bar]))
\ No newline at end of file
+(comment (map #(fq-keyword %) ["foo" :foo :foo/bar]))