What is the problem?
The "Send statistical information" module is added to many times.
!http://www.derky.nl/derk/phpbb.com/bugreport_send_stats1.png

What did you do?
I was verifying the Database updater will update unsupported version bugfix.
!http://www.derky.nl/derk/phpbb.com/bugreport_send_stats2.png
:mrgreen:

What is causing it?
Me of course 8-) because of the crazy version testing.

But there's a check included in the update file, to see if the module is already added. It's checking if the module questionnaire exists and if it does not exist then it will add the module send_statistics. (very nice to debug)
I think it should be named into send_statistics, else it will get added twice for the current SVN users. Patch attached.