Also Google webmaster will not recognize the file it gives you to provide ownership verification. e.g. mysite.co/googleedj893hd8nhd.html would be a 404 even though the file is there.
for the google verify make a RewriteRule in the .htaccess
...
...
RewriteCond %{REQUEST_URI} !/ow_updates/
RewriteCond %{REQUEST_URI} !/googleedj893hd8nhd.html
...
...
now the Rewrite restriction give positiv to the http-request of this html file
greets
FaceT