Why doesn't Safari offer to save my Macrumors login details in my iCloud keychain?
Outcome: the password has changed to the new random password from the forum's point of view, but keychain access still holds the old one.
Works fine for me.
You need to logout then repeat the above refresh page procedure with the new password.
So logout of MR. Enter your new PW in the login field then command-r to refresh the web page and you will get a popup asking if you want Keychain to update to the new password. Tell it yes, then go ahead and login to MR with the new PW.
This worked for me.
I too had issues with this. Finally found a workaround it.
1. Enter User Name and Password in Macrumors Forum Login
2. Do Not Hit Log In
3. Instead Refresh Page in Safari
4. Dialog Box asks if you want to reload page, click Reload
5. Keychain dialog box should now come up
Hope this helps everyone with issues with macrumors & saving to iCloud keychain.