Might be this: https://bugzilla.mozilla.org/show_bug.cgi?id=390036
All my IMAP accounts and the calendar itself use https. ** Bug watch added: Mozilla Bugzilla #390036 https://bugzilla.mozilla.org/show_bug.cgi?id=390036 -- After configuring a caldav Calendar, 100% CPU load, caldav not loaded https://bugs.launchpad.net/bugs/482622 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs