I found a bug on WB 2.8.2 show_menu that was not there before
If you move the pages out of /pages to get them at the root
Menu will be showed, and work on the firt page, but in any other page, the 1st page will not work anymore (in the code, it will go to href="")
but it work perfectly with show_menu2.
But since default templates works with show_menu, this is a bug worth mentionning