Show a warning to people having a corrupted file storage

skin/firstRun.css

 body
 {
   font-family: Arial, Helvetica, sans-serif;
   font-size: 20px;
   background: repeating-linear-gradient(0deg, #F8F6F5, #F6F4F2 50%, #FCFBF9);
   background: -webkit-repeating-linear-gradient(0deg, #F5F4F3, #FAF9F8 50%, #F5F4F3);
   background-size: 5px 5px;
   max-width: 800px;
   margin: auto;
   line-height: 1.5;
@@ skipping 17 matching lines @@
   box-pack: center;
   -webkit-box-orient: vertical;
   -webkit-box-pack: center;
 }
 
 #title-changelog
 {
   font-size: 50%;
 }
 
+#dataCorruptionWarning
+{
+  font-size: 200%;
+  margin: 20px;
+  padding: 20px;
+  border: 3px solid red;
+  border-radius: 10px;
+}
+
 #features
 {
   margin: 10px 0px 40px 0px;
 }
 
 #features > li
 {
   margin-left: 50px;
   list-style-image: url(/skin/checkmark.png);
 }
@@ skipping 133 matching lines @@
   }
 }
 
 @media (max-height: 700px)
 {
   body
   {
     font-size: 16px;
   }
 }