I had a spoke problem about 5 years ago on my tour bike and I had the wheels re spoked and solved the problem. I had access to a testing machine thru work and pull tested new and old spokes and found some differences and started a thread.
http://www.bikeforums.net/touring/75...oke-spoke.html
Rather than retype my story you can read that link. Sorry about the photos there the hosting site went out and left me with a lot of dead links.