we've worked successfully with social zimlet and twitter, even with two twitter accounts. Since one ore two days, we get the following message in Zimbra (browser-pop-up):
https://zimbraserver requests a user name and password. Output of website "Twitter API"
(tranlsated from German).
It doesn't matter if I enter the zimbra or twitter credentials, it appears again. If I click cancel, the following error appears as zimbra message:
"Twitter Error: Timestamp out of bounds"