The Kunena team has announce the arrival of Kunena 7.0.4 [K 7.0.4] in stable which is now available for download as a native Joomla extension for J! 5.4.x/6.0.x. This version addresses most of the issues that were discovered in K 6.2 / K 6.3 / K 6.4 and issues discovered during the last development stages of K 7.0
thank you for this patch. It has helped. I had misunderstood you as you wrote that you can't check. I felt helpless then and corrected all user's language setting via MYSQL after approving their accounts. Your patch is a big relief to me.
@Pinkeltje: Please do not claim that you know from common sense that a Joomla or Kunena installation is faulty just because you do not believe a bug. It is also not correct that 99.9% of users have no problems. This bug leaves all newly registered users without the possibility to post via CKEditor. So it has a real impact.
Goldie: my excuses. I test before replying but I know now why I couldn't reproduce it. I have only the default fields on my registration form and no possibility for my users to select language.