If you have been using Lightning 1.0b3pre nightlies, you’ve been missing out on a number of fixed bugs and new features. This is because we’ve been concentrating on making Lightning work with trunk (the newest comm-central/mozilla-central code).
Although not finally decided, the next Thunderbird version is likely to be from the more stable comm-1.9.2/mozilla-1.9.2 branch. Therefore we have now backported all relevant patches to the comm-1.9.2 branch, giving you the chance to see what the next version will be like. If you are wondering why this hasn’t happened before, it is important that bugs are fixed on trunk first. Otherwise it may happen that a future version loses features and bugfixes a previous release contained, due to problems while porting the code.
The Calendar Team would really appreciate if you could give this nightly a spin, especially if you are maybe using your own calendar server, or maybe one that is not so common. The earlier you test this version, the more likely it is that the 1.0b3 release will not contain bugs that make it unusable for you.
If you haven’t yet downloaded Lightning 1.0b3pre, make sure you have a copy of Thunderbird 3.1 and get Lightning here. If you encounter any bugs be sure to search first. If you can’t find a matching report then file a new one. Please also note which version of Thunderbird/Lightning you are using.
Note: The list of bugs that were fixed, which includes the new features can be found here.