Since I got tired of "crackers" adding stupid text to
http://wiki.lyx.org/pmwiki.php/LyX/Welcome
you now need to enter the password 'lyx' in order to edit that particular page. You should not need a password for editing any of the other pages.
Christian,
I would suggest the choice of a different password, as 'lyx' is too obvious, and, therefore, easily crackable.
Paul
