fixed rake preview and updated sass to sass3 syntax

stylesheets/partials/_sidebar.sass

@@ -2,21 +2,21 @@
   line-height: 1.45em
   font-size: 90%
   h3
-    font-size: #{!h4+2}
+    font-size: $h4 + 2
     margin: 20px -15px 10px
     padding: 12px 15px
-    background: #fff
+    background: white
     border-bottom: 1px solid #e5e5e5
     border-top: 1px solid #e5e5e5
     &:first-child
       margin-top: 0
   h4
-    font-size: #{!h5}
-      
+    font-size: $h5
+
 #twitter, #delicious
   +border-radius
   background: #f8f8f8
-  border: 1px solid #eee
+  border: 1px solid #eeeeee
   padding: 5px 0
   ul
     list-style-type: none
@@ -24,7 +24,7 @@
   li
     margin: 0 15px
     padding: 10px 0 0
-    border-bottom: #ddd 1px dashed
+    border-bottom: #dddddd 1px dashed
     &:last-child
       border-bottom: 0
 
@@ -32,6 +32,6 @@
   p
     font-style: italic
   li
-    color: #666
+    color: #666666
     font-style: normal
-    padding-bottom: 8px
+    padding-bottom: 8px