Agreed that dwelling on the past only prolongs the pain! But it can still take months to get over these mishaps. My number 1 tip is always phone as even sending screenshots of broken store didn't help at all. After 1 week I decided to send an update to resolve the issue myself. I dwelled on that plus other minor stuff all year (from April 2011 to December 2011) before finally being able to get over it and finally stop letting it get to me.
Returning to the thread topic, I'm going to take your advise and migrate too. Now is as good a time as any as I just registered new app name! 3 months should be enough to migrate I hope (don't quote me on that ;-)