User Permission Member and Admin Issue

[Rae]

Members cannot comment even it is enabled unless you tag all members as admin. Trello must fix the bug. 

[Nic Brough -Adaptavist-]

What bug?

You don't need to be an admin to comment on a card.  I think you might want to take a closer look at your site settings, as it sounds like one of your admins has got something very wrong if your members can't comment.