I had a few problems stemming from the fact that I cut my frame over the course of a year. For instance, my sill timbers varied from 7 3/4 to 8" depending on how long before the raising they were cut. It was a little weird where the sill timbers were scarfed together! In the end everything fit together pretty well.
The angles on your brace ends will change from 45 degrees to something slightly different due to the anisotropic drying/shrinking properties of wood. FWIW, from thumbing through timberframe books, that seems to be an eventual problem in frames whether the frame is raised green or allowed to dry some before raising. If you could dry your brace stock before notching it, then this would not be a problem. Just another thing to think about.
Mark, the biggest check in my house is in an Ash beam.
