Thanks guys. I tried it, but it didnt fix the problem. I even inserted the drawing & exploded it and that didnt work. I have ended up overlaying the drawing as an xref, then binding as an insert, then exploding it. It keeps the setting after I do all that. So somewhere along that long winded path, it loses the 96.
Still it would be nice to know what the problem was, or where the setting was taking effect.
Thanks for your help.