On 2010 Dec 07, at 17:14, kvic...@pobox.com wrote:

> i have a core data app … i have setGroupsByEvent set to NO

Wow, I've found that setGroupsByEvent:NO generally causes all hell to break 
loose with Core Data – many warnings printed to Console, and exceptions raised. 
 I've made it a rule to never do that in a Core Data app.  Although I routinely 
begin and end undo groups, they are always super-groups enclosing the groups 
created by Core Data.


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