After an automatically update from 0.5.4 to 0.5.5 the piwik “interface” is out of work (see the attached screenshot)
i removed all .htaccess files
piwik/config/.htaccess
piwik/core/.htaccess
piwik/js/.htaccess
piwik/lang/.htaccess
piwik/libs/.htaccess
piwik/misc/.htaccess_to_use_later
piwik/plugins/.htaccess
piwik/themes/.htaccess
piwik/tmp/templates_c/.htaccess
and everything is fine again,
but maybe only one or some of them are evil …