phpBB upgrade

I'm just wondering what everyone is doing pertaining to this. I ran the command from an earlier post to find all of the outdated phpBB installations:

Code: 
for i in `locate viewtopic.php`; do if grep "htmlspecialchars(urldecode" $i > /dev/null; then echo VULNERABLE $i; fi; done
However I test this by installing phpBB 2.0.6 on an account and then patching it using the install/update_to_2011.php file in the phpBB 2.0.11 full package download. When I did this and went back to the forum it was showing that I am now running 2.0.11, however repeating the above command still shows that this installation is vulnerable. So my question is, how do you know for certain that the phpBB installations listed above are not running 2.0.11? Is the above command faulty? I'm just trying to get a running list of client that are running an outdated version and would like to insure that they are in fact running an older version.

Thanks

 

 

 

 

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