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Twitter notifications are all coming up as:
The transaction resulted in a "Authorization Failed" error. Please check the notifier credentials.
However, the credentials are correct for CERTAIN, and fully tested. For some reason it just stopped working.
HELP
Re: Twitter Notifications Broken
Yes, this is a known issue — Twitter seems to have recently broken the xAuth authentication.
We're working on a fix for the next Simon release.
(I'm also working on a fix for Tweeps, which is similarly broken... but there I can leverage iOS 5's built-in Twitter support, which isn't an option for Simon.)