On polish Wikipedia exist a mechanism notification of mistakes in articles. In Sidebar we have link "Zgłoś błąd" - users who can't edit Wikipedia write notification about mistake.
And this information is saved on this page: http://pl.wikipedia.org/wiki/Wikipedia:Zg%C5%82o%C5%9B_b%C5%82%C4%85d_w_arty...
Template: == [[Name of article]] == Text, about mistakes... Name, Date
Next, users read information and fix mistakes. Please see a history of this page: http://pl.wikipedia.org/w/index.php?title=Wikipedia:Zg%C5%82o%C5%9B_b%C5%82%...
And try mechanism - click link in Sidebar - "Zgłoś błąd".
http://pl.wikipedia.org/wiki/MediaWiki:Wikibugs.js - script.