···<date: 2013-07-12, Friday>···<from: Hans Hagen>···

>                                  it might be that some changes are
> reflected in the betas, and hopefully not breaking anything.

Unhappily, it does. In the generic font loader the new “nuts”
table is a synonym for “nodes”, but it would appear that it is
also required to contain certain functions from the builtin
“node” namespace, e.g. node.copy(), node.tail() and the likes.

Failing example with ligatures:

    \font\foo="file:Iwona-Regular.otf:mode=node;+liga"
    \foo
    ffi
    \bye

Best,
Philipp