Hi! I ran into the exact problem yesterday. Suddenly, the twitter Timeline in Lockinfo was empty, and I haven't been able to restore it since. I do have a legitimate licence for lockinfo. I've tried the following so far without luck:
- Remove and reinstall twitter plugin from cydia (reboot in between)
- Deactivating and activating the plugin
- Re-authorizing my twitter account from within the settings
- Revoking and re-authorizing the app from within twitter web-settings.
At the same time this problem arose, I was also installing a twitter sidebar gadget for my desktop computer (Tweetz). The thing is that Tweetz wasn't able to show my timeline either, although it showed the "mentions"-feed. The lockinfo plugin won't show the "mentioned"-feed either.
I haven't had any experience with this Tweetz gadget, but my bet would be that there might be a problem with third party apps trying to sync with twitter. The official twitter app still works, though.
---------- EDIT ----------
Ok, found these posts on twitter just now, guess that they give some answers to our little problem (Patil is one of the lockinfo twitter plugin authors). I guess we just have to wait.
David Ashman:
I’m getting reports of the twitter plugin not getting data. Do you have any time to debug?
Rajendra Patil:
Failing for me too. Looks Twitter API issue. {"message":"Sorry, that page does not exist","code":34}. Only DMs API is working
---------- EDIT ----------
I looked into it some more, and it seems that Twitter just launched an updated API (v 1.1). I guess many third-party twitter app users are unhappy if the app developers haven't paid attention to the changes to come.
Pasted from one of the twitter development webpages:
In the coming weeks we will release version 1.1 of the Twitter API. To help you plan ahead, we're announcing these changes now, before the new version of the API is available. Changes will include:
-required authentication on every API endpoint
-a new per-endpoint rate-limiting methodology
-changes to our Developer Rules of the Road, especially around applications that are traditional Twitter clients.
From what I understand, the old URLs pointing to a users timeline has been rendered invalid and need to be changed within the plugin code. So I guess we are at the mercy of the plugin developer. Twitter also states that this API housekeeping started on the 9th of october, which corresponds to the start of our problem.
PS: I'd love to put in some links, but since I registered for only an hour ago, I'm not allowed

For anyone interested, try googling "API 1.1 twitter".