diff --git a/4chan_x.user.js b/4chan_x.user.js
index daec9e850..990534c32 100644
--- a/4chan_x.user.js
+++ b/4chan_x.user.js
@@ -1737,7 +1737,9 @@
           return;
         }
         url = window.URL || window.webkitURL;
-        url.revokeObjectURL(this.url);
+        if (typeof url.revokeObjectURL === "function") {
+          url.revokeObjectURL(this.url);
+        }
         fileUrl = url.createObjectURL(file);
         img = $.el('img');
         $.on(img, 'load', function() {
@@ -1769,12 +1771,13 @@
           bb.append(ui8a.buffer);
           _this.url = url.createObjectURL(bb.getBlob('image/png'));
           _this.el.style.backgroundImage = "url(" + _this.url + ")";
-          return url.revokeObjectURL(fileUrl);
+          return typeof url.revokeObjectURL === "function" ? url.revokeObjectURL(fileUrl) : void 0;
         });
         return img.src = fileUrl;
       };
 
       _Class.prototype.rmFile = function() {
+        var _base1;
         QR.resetFileInput();
         delete this.file;
         this.el.title = null;
@@ -1782,7 +1785,7 @@
         if (QR.spoiler) {
           $('label', this.el).hidden = true;
         }
-        return (window.URL || window.webkitURL).revokeObjectURL(this.url);
+        return typeof (_base1 = window.URL || window.webkitURL).revokeObjectURL === "function" ? _base1.revokeObjectURL(this.url) : void 0;
       };
 
       _Class.prototype.select = function() {
@@ -1846,7 +1849,7 @@
       };
 
       _Class.prototype.rm = function() {
-        var index;
+        var index, _base1;
         QR.resetFileInput();
         $.rm(this.el);
         index = QR.replies.indexOf(this);
@@ -1856,7 +1859,9 @@
           (QR.replies[index - 1] || QR.replies[index + 1]).select();
         }
         QR.replies.splice(index, 1);
-        (window.URL || window.webkitURL).revokeObjectURL(this.url);
+        if (typeof (_base1 = window.URL || window.webkitURL).revokeObjectURL === "function") {
+          _base1.revokeObjectURL(this.url);
+        }
         return delete this;
       };
 
@@ -3662,9 +3667,9 @@
       return $.on(a, 'click', DeleteButton["delete"]);
     },
     "delete": function() {
-      var board, form, id, m, o, pwd, self;
+      var board, form, id, m, pwd, self;
       $.off(this, 'click', DeleteButton["delete"]);
-      this.textContent = 'Deleting...';
+      this.innerHTML = '[ Deleting... ]';
       if (m = d.cookie.match(/4chan_pass=([^;]+)/)) {
         pwd = decodeURIComponent(m[1]);
       } else {
@@ -3673,12 +3678,11 @@
       id = $.x('preceding-sibling::input', this).name;
       board = $.x('preceding-sibling::span[1]/a', this).pathname.match(/\w+/)[0];
       self = this;
-      o = {
+      form = {
         mode: 'usrdel',
         pwd: pwd
       };
-      o[id] = 'delete';
-      form = $.formData(o);
+      form[id] = 'delete';
       return $.ajax("https://sys.4chan.org/" + board + "/imgboard.php", {
         onload: function() {
           return DeleteButton.load(self, this.response);
@@ -3687,7 +3691,7 @@
           return DeleteButton.error(self);
         }
       }, {
-        form: form
+        form: $.formData(form)
       });
     },
     load: function(self, html) {
diff --git a/script.coffee b/script.coffee
index 39e616102..119675e9e 100644
--- a/script.coffee
+++ b/script.coffee
@@ -1320,7 +1320,8 @@ QR =
         @el.style.backgroundImage = null
         return
       url = window.URL or window.webkitURL
-      url.revokeObjectURL @url
+      # XXX Opera does not support window.URL.revokeObjectURL
+      url.revokeObjectURL? @url
 
       # Create a redimensioned thumbnail.
       fileUrl = url.createObjectURL file
@@ -1359,7 +1360,7 @@ QR =
 
         @url = url.createObjectURL bb.getBlob 'image/png'
         @el.style.backgroundImage = "url(#{@url})"
-        url.revokeObjectURL fileUrl
+        url.revokeObjectURL? fileUrl
 
       img.src = fileUrl
     rmFile: ->
@@ -1368,7 +1369,7 @@ QR =
       @el.title = null
       @el.style.backgroundImage = null
       $('label', @el).hidden = true if QR.spoiler
-      (window.URL or window.webkitURL).revokeObjectURL @url
+      (window.URL or window.webkitURL).revokeObjectURL? @url
     select: ->
       QR.selected?.el.id = null
       QR.selected = @
@@ -1414,7 +1415,7 @@ QR =
       else if @el.id is 'selected'
         (QR.replies[index-1] or QR.replies[index+1]).select()
       QR.replies.splice index, 1
-      (window.URL or window.webkitURL).revokeObjectURL @url
+      (window.URL or window.webkitURL).revokeObjectURL? @url
       delete @
 
   captcha:
@@ -2882,7 +2883,7 @@ DeleteButton =
     $.on a, 'click', DeleteButton.delete
   delete: ->
     $.off @, 'click', DeleteButton.delete
-    @textContent = 'Deleting...'
+    @innerHTML = '[ Deleting... ]'
 
     if m = d.cookie.match /4chan_pass=([^;]+)/
       pwd = decodeURIComponent m[1]
@@ -2892,17 +2893,16 @@ DeleteButton =
     board = $.x('preceding-sibling::span[1]/a', @).pathname.match(/\w+/)[0]
     self = this
 
-    o =
+    form =
       mode: 'usrdel'
       pwd: pwd
-    o[id] = 'delete'
-    form = $.formData o
+    form[id] = 'delete'
 
     $.ajax "https://sys.4chan.org/#{board}/imgboard.php", {
         onload:  -> DeleteButton.load  self, @response
         onerror: -> DeleteButton.error self
       }, {
-        form: form
+        form: $.formData form
       }
 
   load: (self, html) ->