My previous log-in failed with the new software. The error message was
Incorrect username, email or password
When I tried to reregister, my old user name "Doug Mackie" (which is also my real name) was rejected because it has a space in it. It turns out that without my knowledge, my username was changed to "Doug_Mackie". In addition, my old password was rejected because it is now too short. Both changes are OK by me but members with spaces in their old user names and/or short passwords need to know about this change. They can still log in to their old account by using their e-mail address (not a user name with a space) and by then choosing "I forgot my password". I was mystified until I figured this out on my own.