I was reading "The Gospel of Mark" (NICNT62MK) & on page 486 noticed that when I cursor over forms of the word "Liturgy," the information window comes up with inexplicable cross-references from the DNTB; for example, a section on Jewish Education of Education of Jewish and Greco-Roman Cultures or Content and Leading Ideas of the Apocrypha and Pseudepigrapha.
Highlighting other words get me cross-references that at least make sense.
I'm using L4 SR-3.