diff --git a/src/foreclojure/problems.clj b/src/foreclojure/problems.clj
index 4dc1222c..f7de665f 100644
--- a/src/foreclojure/problems.clj
+++ b/src/foreclojure/problems.clj
@@ -7,10 +7,10 @@
   (:require [sandbar.stateful-session :as session]))
 
 (defn get-solved [user]
-  (into #{}
-        (:solved (fetch-one :users
-                            :where {:user user}
-                            :only [:solved]))))
+  (set
+   (:solved (fetch-one :users
+                       :where {:user user}
+                       :only [:solved]))))
 
 (defn get-problem [x]
   (fetch-one :problems :where {:_id x}))
@@ -23,15 +23,14 @@
 (defn mark-completed [id]
   (if-let [user (session/session-get :user)]
     (do
-      (when (not-any? #(= % id) (get-solved user))
-                      
+      (when (not-any? #{id} (get-solved user))
         (update! :users {:user user} {:$push {:solved id}})
         (update! :problems {:_id id} {:$inc {:times-solved 1}}))
       (flash-msg "Congratulations, you've solved the problem!" "/problems")) 
     (flash-msg "You've solved the problem! If you log in we can track your progress." "/problems")))
 
 (defn get-tester [restricted]
-  (reduce #(conj %1 (symbol %2)) secure-tester restricted))
+  (into secure-tester (map symbol restricted)))
 
 (def sb (sandbox*))
 
@@ -41,16 +40,16 @@
         func-name (:function-name p)
         sb-tester (get-tester (:restricted p))]
     (try
-      (loop [t tests]
-        (if (empty? t)
+      (loop [[test & more] tests]
+        (if-not test
           (mark-completed id)
-          (let [testcase (replace-str "__" code (first t))]
+          (let [testcase (replace-str "__" code test)]
             (if (sb sb-tester (read-string testcase))
-              (recur (rest t))
+              (recur more)
               (do
                 (session/flash-put! :code code)
                 (flash-error "You failed the unit tests."
-                           (str "/problem/" id)))))))
+                             (str "/problem/" id)))))))
       (catch Exception e
         (do
           (session/flash-put! :code code)
@@ -90,15 +89,15 @@
    (let [solved (get-solved (session/session-get :user))]
      (map-indexed
       (fn [x p]
-        (vec [:tr (row-class x)
-              [:td {:class "title-link"}
-               [:a {:href (str "/problem/" (p :_id))}
-                (p :title)]]
-              [:td {:class "centered"}
-               (map #(str % " ") (p :tags))]
-              [:td {:class "centered"} (p :times-solved)]
-              [:td {:class "centered"}
-               (if (contains? solved (p :_id))
-                 [:img {:src "/checkmark.png"}]
-                 [:img {:src "/empty-sq.png"}])]]))
-      (get-problem-list)))])
\ No newline at end of file
+        [:tr (row-class x)
+         [:td {:class "title-link"}
+          [:a {:href (str "/problem/" (p :_id))}
+           (p :title)]]
+         [:td {:class "centered"}
+          (map #(str % " ") (p :tags))]
+         [:td {:class "centered"} (p :times-solved)]
+         [:td {:class "centered"}
+          [:img {:src (if (contains? solved (p :_id))
+                        "/checkmark.png"
+                        "/empty-sq.png")}]]])
+      (get-problem-list)))])
diff --git a/src/foreclojure/utils.clj b/src/foreclojure/utils.clj
index 73267c9e..1c8500b6 100644
--- a/src/foreclojure/utils.clj
+++ b/src/foreclojure/utils.clj
@@ -4,15 +4,16 @@
   (:require [sandbar.stateful-session :as session]
             (ring.util [response :as response])))
 
-(defmacro dbg[x] `(let [x# ~x] (println '~x "=" x#) x#))
+(defmacro dbg [x]
+  `(let [x# ~x] (println '~x "=" x#) x#))
 
-(defn flash-error [msg url]
-  (do (session/flash-put! :error msg)
-      (response/redirect url)))
+(defn flash-fn [type]
+  (fn [msg url]
+    (session/flash-put! type msg)
+    (response/redirect url)))
 
-(defn flash-msg [msg url]
-  (do (session/flash-put! :message msg)
-      (response/redirect url)))
+(def flash-error (flash-fn :error))
+(def flash-msg (flash-fn :message))
 
 (defmacro def-page [page-name [& args] & code]
   `(defn ~page-name [~@args]
@@ -53,4 +54,4 @@
        [:img {:src "/PoweredMongoDBbeige50.png"}]]]
      [:div {:id "content"} body]
      [:footer      
-      [:span {:id "footer"} "© 2011 David Byrne" ]]]]))
\ No newline at end of file
+      [:span {:id "footer"} "© 2011 David Byrne" ]]]]))