On Wed, 30 Jul 2008, Sven Schreiber wrote:
 > We have a "preserve" option for nulldata.  At present
this only 
 > preserves existing matrices.  I think it should probably preserve 
 > existing scalars too, but I'm not going to attempt that for 1.7.6, 
 > I'll put it on the list for 1.7.7.
 
 Agreed. Do you want me to create a tracker item for this? 
That's probably a good idea.
Allin.