Ooops! I forgot where the broke- It was on the hub end. I'll do an edit.
Scott- Not double butted. Tensioned like I always do, and I do give those crossings a squeeze.
I have had similar experience like Brooklyn where a loosely spoked wheel broke some spokes. I retensioned after replacement of 2. So far customer is happy.
In the past I have pondered people destroying freshly spoked wheels and wondered if they were too tight or too loose, but since it didnt happen to me until now I had no real data.
-SP