diff --git a/ikrpg.appcache b/ikrpg.appcache
index bf83c45..507aeb5 100755
--- a/ikrpg.appcache
+++ b/ikrpg.appcache
@@ -1,5 +1,5 @@
 CACHE MANIFEST
-# 2016-01-31-v3
+# 2016-01-31-v4
 
 CACHE:
 
diff --git a/static/images/ppforums/submarine-explorer.jpg b/static/images/ppforums/submarine-explorer.jpg
new file mode 100644
index 0000000..8803beb
Binary files /dev/null and b/static/images/ppforums/submarine-explorer.jpg differ