We are happy to announce that a Release Candidate for Lightning version 1.9.1 is now available for testing here. For those using linux, please use the build in the linux/ folder rather than the platform-specific folders. Windows users can find their builds in the “unsigned” folder.
This version fixes an issue that prevents some events from being modified and some reminders from being dismissed in CalDAV calendars with Offline Support enabled – those affected are encouraged to test this build. If you have seen an error message with “this.mItemInfoCache[aNewItem.id] is undefined”, this is you! Be sure to reset your cache, by unchecking the “Offline Support” checkbox, restarting, then checking it again.
The full list of changes in this version can be found here.
It is really important that you test this pre-release, as it will become the next release for Thunderbird 17. There is no additional beta phase, this is it! If you are using Thunderbird 17, please give it a try and let us know if you encounter any errors.