After the recent update, I noticed that my entire contact list had been wiped clean. Luckily, I have a recent backup. This problem has been reported previously.
Secondly when I send a new email or reply to an existing email and then press SEND, the program closes rather than telling me that the email has been sent. Again, fortunately, the emails do get sent normally but the program should remain open.
I am a little wary about other introduced bugs and may stop future updates until they have been in service for a month or so.