diff --git a/src/bean/functions.cljs b/src/bean/functions.cljs
index e615c1e..0d03d1b 100644
--- a/src/bean/functions.cljs
+++ b/src/bean/functions.cljs
@@ -40,7 +40,7 @@
   (remove #(every? nil? %) matrix))
 
 (defn minimum-matrix [matrix]
-  (if (not (first (first matrix)))
+  (if (zero? (count (first matrix)))
     [[nil]]
     matrix))
 
@@ -124,7 +124,13 @@
 
               new-selection
               (->> (util/map-on-matrix
-                    #(get first-match (:representation (util/get-cell (:grid sheet) %)))
+                    #(let [value (:representation (util/get-cell (:grid sheet) %))]
+                       (if (empty? value)
+                         ;;  Hack for null references cells (to make it work like a left join)
+                         ;;  return a null cell 
+                         ;;  but this breaks the renderer etc so we'll fix this later
+                         [79 15]
+                         (get first-match value)))
                     (:selection from-frame))
                    remove-nil-columns
                    remove-nil-rows)]
@@ -147,7 +153,11 @@
                                              (and (contains? (:skips frame-result) %)
                                                   (contains? (:skips label-cells) %))) %))
                                  remove-nil-columns
-                                 remove-nil-rows)]
+                                 remove-nil-rows
+                                ;;  Hack for null references cells
+                                ;;  these come from top left labels
+                                 (util/map-on-matrix
+                                  #(if-not % [79 15] %)))]
           {:matrix (address-matrix->cells-matrix sheet (minimum-matrix new-selection))
            :frame (merge frame-result {:selection new-selection})})
         (errors/label-not-found
diff --git a/src/bean/grid.cljs b/src/bean/grid.cljs
index 1a58325..96a848f 100644
--- a/src/bean/grid.cljs
+++ b/src/bean/grid.cljs
@@ -307,7 +307,7 @@
           (let [existing-cell (util/get-cell (:grid sheet*) address)
                 new-cell (-> existing-cell
                              (assoc :content (:content attrs))
-                             (assoc :style (merge (:style existing-cell) (:style attrs))))
+                             (assoc :style (:style attrs)))
                 new-sheet (eval-cell address sheet* new-cell true)]
             (if (:merge-until attrs)
               (merge-cells new-sheet
@@ -387,7 +387,7 @@
 (defn clear-area [sheet {:keys [start end]}]
   (->> (util/addresses-matrix start end)
        (mapcat identity)
-       (map #(do [% {:content ""}]))
+       (map #(do [% {:content "" :style {}}]))
        (into {})
        (update-cells-bulk sheet start)))
 
diff --git a/src/bean/ui/db.cljs b/src/bean/ui/db.cljs
index 7788a28..7347967 100644
--- a/src/bean/ui/db.cljs
+++ b/src/bean/ui/db.cljs
@@ -55,7 +55,8 @@ average:{x.sum() / x.count()}"))
                 (assoc :grid-dimensions {:num-rows num-rows
                                          :num-cols num-cols
                                          :row-heights (vec (repeat num-rows (:cell-h styles/sizes)))
-                                         :col-widths (vec (repeat num-cols (:cell-w styles/sizes)))}))
+                                         :col-widths (vec (repeat num-cols (:cell-w styles/sizes)))})
+                (assoc :frames {}))
      :ui {:help-display false
           :grid {:editing-cell nil
                  :selection nil
diff --git a/src/bean/ui/events.cljs b/src/bean/ui/events.cljs
index e7b0e2b..40f3f03 100644
--- a/src/bean/ui/events.cljs
+++ b/src/bean/ui/events.cljs
@@ -10,7 +10,8 @@
             [bean.ui.util :as util]
             [day8.re-frame.undo :as undo :refer [undoable]]
             [re-frame.core :as rf]
-            [reagent.core :as rc]))
+            [reagent.core :as rc]
+            [bean.area :as area]))
 
 (rf/reg-event-db
  ::initialize-db
@@ -51,6 +52,13 @@
  (fn clear-area [db [_ area]]
    (update-in db [:sheet] #(grid/clear-area % area))))
 
+(rf/reg-event-fx
+ ::save-to-slot
+ ;;  for repl usage only
+ (fn set-demo [{:keys [db]} [_ frame-name]]
+   {:db (assoc-in db [:ui :current-demo-name] frame-name)
+    :fx [[:dispatch [::export-demos]]]}))
+
 (rf/reg-event-fx
  ::export-demos
  (fn [{:keys [db]} [_]]
@@ -254,12 +262,6 @@
  (fn [db [_]]
    (assoc-in db [:ui :grid :selection] nil)))
 
-(rf/reg-event-fx
- ::select-frame
- (fn select-frame [{:keys [db]} [_ frame-name]]
-   (let [{:keys [start]} (get-in db [:sheet :frames frame-name])]
-     (when start {:fx [[:dispatch [::edit-cell start]]]}))))
-
 (rf/reg-event-fx
  ::make-frame
  (undoable)
@@ -285,7 +287,6 @@
 
 (rf/reg-event-db
  ::highlight-matrix
- (undoable)
  (fn highlight-matrix [db [_ content]]
    (assoc-in db [:ui :grid :highlighted-cells]
              (set (mapcat identity (get-in
diff --git a/src/bean/ui/paste.cljs b/src/bean/ui/paste.cljs
index aa714c4..b384996 100644
--- a/src/bean/ui/paste.cljs
+++ b/src/bean/ui/paste.cljs
@@ -70,7 +70,7 @@
                              [(when (get-in cell [:style :bold])
                                 "font-weight: bold")
                               (when-let [bg (get-in cell [:style :background])]
-                                (str "background: " (util/color-int->hex bg)))])}
+                                (str "background: " (.toString bg 16)))])}
         (when mc {:colspan (str (inc (- mc c)))})
         (when mr {:rowspan (str (inc (- mr r)))}))
        (:representation cell)])))