Comment 6 for bug 651088

To recover from this situation, you can erase/move the "by_default" key collection Gwibber creates through the keyring manager of Gnome.
It is found in the ~/.gnome2/keyrings/ directory.
Mine was broken, no way to edit or change password from the seahorse app, and it's still broken afterward once recreated by gwibber; but at least gwibber starts again.
The "Add" button for the twitter registration still is not showing itself after the login from twitter is done successfully. I cannot add a twitter account to the list still.
So Gwibber is back, but still not functional with Twitter.