Thunderbird & Lightning & Google Sync (compatibility 64 bit Linux)

If you run Thunderbird on a 64 bit Linux system you might have tried the calendar add-on "Lightning" and maybe even the synchronization add-on "Provider for Google calendar".
Linux (Ubuntu or Fedora) gets always the newest versions of Thunderbird via it's integrated package manager (Debian = apt-get; Red Hat = yum).
If you have had the problem that "Not compatible with Thunderbird x.x.x" please note that you can help yourself by downloading both add-ons from this special link:
1. Download specific Lightning
http://releases.mozilla.org/pub/mozilla.org/calendar/lightning/releases/1.0b2rc3/contrib/linux-x86_64/lightning.xpi
2. Download specific Provider for Google calendar

http://releases.mozilla.org/pub/mozilla.org/calendar/lightning/releases/1.0b2rc3/contrib/linux-x86_64/gdata-provider.xpi

1.0b2rc3 (change to latest appropriate version)

3. Install downloaded add-ons

Tools → Add-ons → Install → Choose the *.xpi → Restart Thunderbird

Other usefull links:

https://wiki.mozilla.org/Calendar:Lightning

https://wiki.mozilla.org/Calendar:GDATA_Provider