Dear Guru,
I was experianced some weird things in Analysis Services 2005 (with SP1). My cube structure:
 
3 measures in measure group 
5 calculated measures
3 time dimension 
more than 10 flat dimension (dim with no hierarchy)
 
When I tried to design an aggregation using the wizard, I always got 0% aggregation, even thought I choose 100%. 
FYI, the same wizard working fine with the others cube.
 
What's wrong?
 
Thanks
Hendra