bug in wiki: missing skin after login with old login

Hello.
The wiki displays fine to me when I’m not connected. It dispays fine too when I’m logged in with an account created today (berteh_be), but it crashes when I try to log with my old wiki account (berteh)… displaying the following error:

[code]Warning: Skin::require_once(/data/web/b6/16/aa/synfig.org/htdocs/mediawiki-1.15.1/skins/SynfigWiki.php) [skin.require-once]: failed to open stream: No such file or directory in /data/web/b6/16/aa/synfig.org/htdocs/mediawiki-1.15.1/includes/Skin.php on line 139

Fatal error: Skin::require_once() [function.require]: Failed opening required ‘/data/web/b6/16/aa/synfig.org/htdocs/mediawiki-1.15.1/skins/SynfigWiki.php’ (include_path=’/data/web/b6/16/aa/synfig.org/htdocs/mediawiki-1.15.1:/data/web/b6/16/aa/synfig.org/htdocs/mediawiki-1.15.1/includes:/data/web/b6/16/aa/synfig.org/htdocs/mediawiki-1.15.1/languages:.:/usr/share/php:/usr/share/pear’) in /data/web/b6/16/aa/synfig.org/htdocs/mediawiki-1.15.1/includes/Skin.php on line 139[/code]

Berteh.