I just upgraded 4.2.2 to 4.3 and found a couple issues:
1. On Log In either in the widget or Login page, any errors encountered for missing/invalid username or password are not showing the associated error message. The Lost Password message looks like the only message that displays normally.
2. The change to form labels has made the "Remember Me" label unclickable because the ID used in the label is missing the $instance qualifier, so it does not match the associated checkbox. This is true for both the widget and Login page, but should be an easy fix.
I really like this plugin but I backed out the upgrade until these issues are resolved.
thanks