Open link in new window/tab option in menus keeps resetting to unchecked.
I have noticed this several times when on 3.4.1, and I just upgraded to 3.5.1 and the checkbox is blank eventhough the link was set to open in a new window and working before the upgrade.
Is this a know bug? I am not sure when exactly the reset occurs but this has happened several times.
UPDATE: just noticed that the 1st level menu item didn't change, only see it with the sub-menu items (2nd level).