I too have noticed problems since the migration to V4. I believe that you are absolutely correct in that the migration SQL led to an exponential increase in problems. I sometimes get ACs attempt to re-install itself too, but if I let it try and fail, then I can start it ok. I didn't update to 4.073 because I didn't want to fight with the update. Previous updates were easy to install--I could do it in no time flat. Now I get error messages and have to call tech support--and I haven't had the time to do so and possibly wait for a call back. Though Claire and Jodie tend to call me back.
