SS and passwords

Since installing SS on my MacBook, my IMAP password won’t stick in the Mail Preferences, so I have to retype it in each time. I’ve repaired the KeyChain, so that’s not the problem. Re-entering my password into the Accounts dialog doesn’t work either: Mail immediately forgets it.

Is it a coincidence that this started as soon as I installed SS?

There’s a well-known bug in Mail where it asks for the password in response to a variety of network/server errors, even though the correct password is already stored.

Is it a coincidence that this started as soon as I installed SS?

Yes.