I'm not sure what criteria is being used to link separate emails into 'conversations', but yesterday morning I flagged an email, installed 14.2, and after 14.2 the email that I flagged was not in my inbox list of emails. I eventually found the flagged email posted as part of a 'conversation' with only the last email in the 'conversation' showing in my inbox. To make the situation worse, in moving the flagged email down it lost the flag I had put on.