Update Sphinx to 0.6.7.
diff --git a/Doc/README.txt b/Doc/README.txt
index d32d1ed..0e70be5 100644
--- a/Doc/README.txt
+++ b/Doc/README.txt
@@ -73,7 +73,7 @@
 
 You'll need to install the Sphinx package, either by checking it out via ::
 
-   svn co http://svn.python.org/projects/external/Sphinx-0.6.5/sphinx tools/sphinx
+   svn co http://svn.python.org/projects/external/Sphinx-0.6.7/sphinx tools/sphinx
 
 or by installing it from PyPI.