Wikimedia Bugzilla is closed!

Installing CentralNotice using the web installer aka mw-config will fail with something like "couldn't find CNDatabasePatcher in Hooks.php"

CentralNotice autoloads the CNDatabasePatcher class in $wgExtensionFunctions
which is actually needed by the hook 
$wgHooks[ 'LoadExtensionSchemaUpdates' ][ ] = 'CNDatabasePatcher::applyUpdates';

It seems that the installer runs the hook before calling $wgExtensionFunctions and hence CNDatabasePatcher isn't loaded.

I think its plain wrong to load the classes using $wgExtensionFunctions as per http://www.mediawiki.org/wiki/Manual:$wgExtensionFunctions