The relativenumber option was added in Vim 7.3 not 7.0.

diff --git a/.vimrc b/.vimrc
index 9906303..b601e41 100644 (file)
--- a/.vimrc
+++ b/.vimrc
@@ -386,7 +386,7 @@ endfun "}}}2
 fun! Number(resize) "{{{2
   call Iain_Vars()
   let &number = ! &number
-  if version >= 700
+  if version >= 703
     let &relativenumber = &number
   endif