This per-object display mode bug with curves introduced in V6 is a major problem over here. I really hoped this could be fixed before V6 ships and now I just saw the fix is slated for 7.0 ???
Hope you can reconsider its priority.
The bugs in new functionalities are one thing, but things that worked well in past versions and work no more in V6 IMHO should be high on to-fix list.