After the update of the system, the agenda lightning still started, but was not localized. Extensions manager then indicated that lightning 3.3 is not compatible with thunderbird 38.1. I worked around the problem removing the rpm thunderbird-lightning-3.3-6.mga5 and adding the extension through extensions manager. Reproducible: Steps to Reproduce:
Hi José. I think the real bug here is that your existing thunderbird-lightning-3.3-6.mga5 package should have been automatically removed by rpmdrake upon your system update as Lightning is now going to be bundled by default with *all* Thunderbird installations from version 38 onwards. I'm not a Lightning user. I've never used it. So imagine my surprise when after installing the same update, I suddenly had an agenda side panel I'd never seen before. At the bottom of my screen was a button bar asking to "Disable", "Keep", or get "Learn More" about the extension. Clicking "Learn More" leads to the following release from Mozilla: https://support.mozilla.org/en-US/kb/thunderbird-calendar-integration
CC: (none) => johnltw
Lightning is now a part of Thunderbird, you just have to enable it. You shouldn't install any external extension for it anymore.
Status: NEW => RESOLVEDResolution: (none) => INVALID