after upgrade to public beta, Mail always shows "there is a problem with your mailboxes" and I have to "Quit" or "Quit and rebuild”. During the rebuild process, there is a very huge (can up to several GB) log file named as $date_Library.log in /Users/username/Library/Containers/com.apple.mail/Data/Library/Logs/Mail. Then, I have to reset the Mail to factory setting follows the instruction (https://discussions.apple.com/thread/5118986)
But when upgrade to PB4, the issue goes worse. The reset is not working. Finally, I have to reinstall PB and also try restore from time machine. Still, Mail crashed.
Anyone comments will be appreciated.
I have to say, the 10.11 PB is much much much worse than 10.10 PB. During the 10.10 PB, basically, I have no big issues.