Submitted by jan_rifkinson on 2009/03/26 09:46
See attached file. This is usually cured by closing-reopening grid, sometimes closing / re-opening program.  In this case I had to re-construct the grid.
 
--
Jan Rifkinson
Ridgefield CT USA

Comments

I have exactly the same problem.
 
With, sometimes, some variants (empty tabs):
 

 
Fortunately, I haven't lost any columns yet.