So, it seems to be caused by renaming an existing menu item like "forum" to "discussion" or "groups" to "clubs"..... Creates some other weirdness too.  Maybe someone else can try this and verify?

Do you have that problem on demo.oxwall.org, too? Or only with your website?

My users using IE are complaining of the same problem. They get logged out, any update on this?

Maryam, can you ask your user to check this on demo? We can't reproduce this issue.