This is to prevent title vandalism.

This is obviously a bug, since it practically changes move permission from autoconfirmed to two-month-accounts when every page is flagged. a discussion took place at http://de.wikipedia.org/wiki/Wikipedia_Diskussion:Projektneuheiten#Verschieben

No, that would not be called a bug, since it is entirely deliberate. Of course, it can be tweaked if desired.

wikipedia wrote:

The biggest Problem is that it provokes copy'n'paste-movements done by newbes which violates our license - title vandalism is not so common. Why not just unwatch the article after moving? (With autoreview if you are a reviewer).

gnu1742 wrote:

I think that the german Wikipedia was chosen for a test of the flaggedrev feature, because it is one of the biggest WPs around and also has a lot of contributors. Thus we have a lot of observing eyes which can handle this issue better than any technical solution. Title vandalism is not really a problem on de-wp, but this feature annoys a lot of users. Probably it is helpful on smaller wikimedia projects, but it should be deactivated on projects with a working community above a certain size. Wikipedia grew big by the skills and effort of individual people, so we should still rely on them in future.

For know, sysadmin can set $wgGroupPermissions['autoconfirmed']['movestable'] = true; to lift the restriction.

/for know/for now ;)

Thank you very much! I requested a config change in bug 14166.