diff --git a/models/site.rb b/models/site.rb
index 2b19c68a..9badbb11 100644
--- a/models/site.rb
+++ b/models/site.rb
@@ -52,6 +52,9 @@ class Site < Sequel::Model
   LOSSLESS_IMAGE_REGEX = /png|bmp|gif/
   LOSSY_IMAGE_REGEX    = /jpg|jpeg/
   HTML_REGEX           = /htm|html/
+  
+  SCREENSHOT_RESOLUTIONS = ['235x141', '105x63', '270x162']
+  THUMBNAIL_RESOLUTIONS  = ['105x63']
 
   many_to_one :server
 
@@ -180,7 +183,7 @@ class Site < Sequel::Model
     FileUtils.mv uploaded.path, file_path(filename)
     File.chmod(0640, file_path(filename))
 
-    ext = File.extname(filename).gsub('.', '')
+    ext = File.extname(filename).gsub(/^./, '')
 
     if ext.match HTML_REGEX
       ScreenshotWorker.perform_async values[:username], filename
@@ -218,8 +221,13 @@ class Site < Sequel::Model
     begin
       FileUtils.rm file_path(filename)
     rescue Errno::ENOENT
-      return false
     end
+
+    ext = File.extname(filename).gsub(/^./, '')
+
+    screenshots_delete(filename) if ext.match HTML_REGEX
+    thumbnails_delete(filename) if ext.match IMAGE_REGEX
+
     true
   end
 
@@ -369,6 +377,28 @@ class Site < Sequel::Model
     values[:title] || values[:username]
   end
 
+  def screenshots_delete(filename)
+    SCREENSHOT_RESOLUTIONS.each do |res|
+      begin
+        FileUtils.rm screenshot_path(filename, res)
+      rescue Errno::ENOENT
+      end
+    end
+  end
+  
+  def thumbnails_delete(filename)
+    THUMBNAIL_RESOLUTIONS.each do |res|
+      begin
+        FileUtils.rm thumbnail_path(filename, res)
+      rescue Errno::ENOENT
+      end
+    end
+  end
+
+  def screenshot_path(filename, resolution)
+    File.join(SCREENSHOTS_ROOT, values[:username], "#{filename}.#{resolution}.jpg")
+  end
+
   def screenshot_exists?(filename, resolution)
     File.exist? File.join(SCREENSHOTS_ROOT, values[:username], "#{filename}.#{resolution}.jpg")
   end
@@ -377,9 +407,17 @@ class Site < Sequel::Model
     "#{SCREENSHOTS_URL_ROOT}/#{values[:username]}/#{filename}.#{resolution}.jpg"
   end
   
-  def thumbnail_exists?(filename, resolution)
+  def thumbnail_path(filename, resolution)
     ext = File.extname(filename).gsub('.', '').match(LOSSY_IMAGE_REGEX) ? 'jpg' : 'png'
-    File.exist?(File.join(THUMBNAILS_ROOT, values[:username], "#{filename}.#{resolution}.#{ext}"))
+    File.join THUMBNAILS_ROOT, values[:username], "#{filename}.#{resolution}.#{ext}"
+  end
+  
+  def thumbnail_exists?(filename, resolution)
+    File.exist? thumbnail_path(filename, resolution)
+  end
+  
+  def thumbnail_delete(filename, resolution)
+    File.rm thumbnail_path(filename, resolution)
   end
   
   def thumbnail_url(filename, resolution)
diff --git a/views/dashboard.erb b/views/dashboard.erb
index db5391c8..1f3abe8c 100644
--- a/views/dashboard.erb
+++ b/views/dashboard.erb
@@ -54,17 +54,30 @@
 
 <div class="content wide">
 
+<% unless current_site.changed_count > 5 %>
 <div class="welcome">
-  <div class="close-button"></div>
+  <!-- <div class="close-button"></div> -->
   <h4>Hello! Welcome to your new site.</h4>
   To get started, click on the <strong>index.html</strong> file below to edit it. It's your home page! You can add more files (such as images) from your computer by dragging them into the box below. Need help building web sites? Check out these <a href="/tutorials">tutorials</a>!
 </div>
+<% end %>
 
   <% if @error %>
     <div class="alert alert-block alert-error">
       <p><%= @error %></p>
     </div>
   <% end %>
+  
+  <% if flash.keys.length > 0 %>
+    <div class="alert alert-block">
+      <p>
+        <% flash.keys.each do |key| %>
+          <%= flash[key] %>
+        <% end %>
+      </p>
+    </div>
+  <% end %>
+  
 
 <div class="files">
   <div class="header">
diff --git a/workers/screenshot_worker.rb b/workers/screenshot_worker.rb
index a954c5b4..5610eb5e 100644
--- a/workers/screenshot_worker.rb
+++ b/workers/screenshot_worker.rb
@@ -27,7 +27,6 @@ module Phantomjs
 end
 
 class ScreenshotWorker
-  REQUIRED_RESOLUTIONS = ['235x141', '105x63', '270x162']
   SCREENSHOTS_PATH = File.join DIR_ROOT, 'public', 'site_screenshots'
   include Sidekiq::Worker
   sidekiq_options queue: :screenshots, retry: 3, backtrace: true
@@ -82,7 +81,7 @@ class ScreenshotWorker
     user_screenshots_path = File.join SCREENSHOTS_PATH, username
     FileUtils.mkdir_p user_screenshots_path
 
-    REQUIRED_RESOLUTIONS.each do |res|
+    Site::SCREENSHOT_RESOLUTIONS.each do |res|
       img.scale(*res.split('x').collect {|r| r.to_i}).write(File.join(user_screenshots_path, "#{filename}.#{res}.jpg")) {
         self.quality = 90
       }
diff --git a/workers/thumbnail_worker.rb b/workers/thumbnail_worker.rb
index 804b15b2..d09881c4 100644
--- a/workers/thumbnail_worker.rb
+++ b/workers/thumbnail_worker.rb
@@ -1,7 +1,6 @@
 require 'RMagick'
 
 class ThumbnailWorker
-  REQUIRED_RESOLUTIONS = ['105x63']
   THUMBNAILS_PATH = File.join DIR_ROOT, 'public', 'site_thumbnails'
   include Sidekiq::Worker
   sidekiq_options queue: :thumbnails, retry: 3, backtrace: true
@@ -14,7 +13,7 @@ class ThumbnailWorker
     user_thumbnails_path = File.join THUMBNAILS_PATH, username
     FileUtils.mkdir_p user_thumbnails_path
 
-    REQUIRED_RESOLUTIONS.each do |res|
+    Site::THUMBNAIL_RESOLUTIONS.each do |res|
       resimg = img.resize_to_fit(*res.split('x').collect {|r| r.to_i})
       format = File.extname(filename).gsub('.', '')