In reply to ShoePolice:
> Anyone able to say for sure?
no - but.
From memory about 6 years ago Dynafit screwed up a bit with one of their boot models (can't remember exactly which ones). The toe-lug was not shaped properly to function as a binding attachment - at first glance it looked like a normal boot, but the lug was essentially too short. This caused some confusion overt their suitability for a frame binding - It was later made clear (I read it Bergundsteigen, and was specific to one boot model) that these boots categorically should not be used in anything other than pin bindings.
I don't know what you have uncovered in your research - hopefully not some hangover from this previous uncertainty. I have not heard of this problem reoccurring since.......
I would expect that they wont produce something similar again in this day and age. If it looks like a binging-lug and not just a crampon bail grove I would take it as ok for a frame binding. [maybe just me :-/ shrug....]
(n.b. I haven't any 1st hand experience of Sal frame bindings - so I'm assuming that these can adjust like any other touring frame binding and you can raise the toe-piece to the right height)