Ugh...Here is what happened.
I actually added an inheritance structure, I did the automatic 'construct target per entity' it added this (and other) entities to a hierachy (and I was not using them in a hierarchal fashion before). So, I updated all typed lists and items to work and was all very happy.
UNTIL, I tried to .......see complete description.......
http://www.llblgen.com/TinyForum/Messages.aspx?ThreadID=9232
So, now I am looking at having to undo the typed lists, break the hierarchy, redo the typed lists (some of which I no longer needed at all thanks to the hierarchy) and change all the code back.....
I may opt for the 'extra entity' workaround, which I am not fond of but I think it beats doing the above....