For the record, this is now fixed on the server-side: http://identi.ca/notice/61490309 and Gwibber works for me again.
** Changed in: ca-certificates (Ubuntu) Status: Confirmed => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/696445 Title: gwibber stopped talking to identi.ca -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs