1.387 special

core/src/main/java/hudson/Functions.java

@@ -1298,4 +1298,11 @@ public class Functions {
         return Boolean.getBoolean("hudson.security.ArtifactsPermission");
     }
 
-}
+    /**
+     * 1.387 special
+     */
+    public static String getBackgroundImage() {
+        // for one week.
+        return System.currentTimeMillis() < 1291363200000L ? "i387.jpg" : "hudson.png";
+    }
+}
\ No newline at end of file

core/src/main/resources/lib/layout/layout.jelly

@@ -209,7 +209,7 @@ THE SOFTWARE.
       </tr>
     </table>
     <table id="main-table" width="100%" height="70%" border="0"
-        style="background-image: url(${imagesURL}/hudson.png);
+        style="background-image: url(${imagesURL}/${h.backgroundImage});
                background-repeat: no-repeat; background-position: bottom left;">
       <tr>
         <td id="side-panel" width="20%">