If you have a Mootools conflict with Kunena, look for the following symptoms:
The performance of the forum on your website become unacceptably or noticeably slow
The BBcode toolbar is not displayed and does not work
You can't edit profiles
Smileys don't work[5]
The Kunena tabbed menu does not appear or does not work
Implications for Kunena users
Missing BBcode toolbar and smiley behaviour
Javascript-related problems show themselves in many different ways. If you are having issues with Mootools after you upgraded your existing Joomla install from pre-1.5.19 to that version (or any newer version of Joomla) it is most likely due to an incomplete Joomla upgrade. When you upgrade your Joomla version via any of the supported file upgrade steps you also have to make sure that you logout from your admin user and login again. Only then will Joomla perform additional upgrade steps like the installation of the MTupgrade plugin needed for the Mootools 1.2.4 support that Kunena 1.6 requires. It is unfortunate that the Joomla installation descriptions do not include this as a necessary step.
So if you are on Joomla 1.5.19 or newer and don't see "System - Mootools Upgrade" it is probably due to the fact that no new "admin login" has been performed since Joomla was upgraded.
You should not not install this plugin from any other sources, but make sure you log out your admin user and log back in. After that you should be able to find the "System - Mootools Upgrade" plugin in your Plugin Manager. Make sure it is enabled.
Je suis sous Joomla 1.5.23, j'ai Kunena 1.7 et System - Mootools Upgrade est bien activé, version 1.2.5
Tu as peut-être plusieurs version de Mootools qui sont chargés en même temps ce qui cause un conflit
Tu as un script qui cause un conflit avec Mootools
