Lightning 1.9b2 is now available on addons.mozilla.org. It is compatible to Thunderbird 17 and its betas, which will also be released as Thunderbird 17 ESR. This means testing is more important than ever, since this is a version that will stick around a bit longer.
This is why we need you! Without your testing work, possibly critical bugs might go by unnoticed. Not only does this mean extra pain for the end user, it also means more work for us to do emergency releases.
Please take a moment to download Thunderbird 17 beta and Lightning 1.9b2 and report any issues you find. There have been quite a few fixes in printing support and some drastic changes to the cached calendar / offline support. Your main area of testing should therefore be printing and any kind of cached calendar, for example with a CalDAV server or the Provider for Google Calendar. For those of you using WCAP, support for the cache has been restored in this release too.
Of course I’m eager to hear about problems in any other area, so give it a try and either comment here or file a bug!