After upgrading from 1.10.1. to 1.18.1 the change of the watchlist using the link on the page does not work, instead the message MediaWiki:Watcherrortext turns up. Special:Watchlist works fine. I detected, that the target address generated by the link after action=watch&token= contains a different token as in Special:Preferences#mw-prefsection-watchlist, if that matters.
- MediaWiki 1.18.1
- PHP 5.2.14 (apache2handler)
- MySQL 5.0.26
Any piece of advice is welcome.