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I am a recent convert to Linux and delighted that Thunderbird 3.1 is available in Ubuntu 11.04, but I can't install the excellent Lightning calendar add-on which I find so useful onto my desktop pc [on Thunderbird/About Thundebird, the set is 'Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.17) Gecko/20110424 Thunderbird/3.1.10'].

Confusingly, my net-book which also runs exactly the same software has Lightning as part of Thunderbird [my notebook set up is Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2.17) Gecko/20110424 Lighning/1.Ob2 Thunderbird/3.1.10'], so why can't I get the add-on for my desktop?

Any help appreciated. Andy T

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Are you getting any sort of error message? Describe what you do to try to install it and what happens. –  Andrew Lambert May 19 '11 at 18:39
    
This is generally caused by trying to install the version from addons.mozilla.org which is a 32 bit binary on a 64 bit system. Unlike most addons, this one has a binary component. We provide Lightning as a package (xul-ext-lightning) in Ubuntu for this reason. I give instructions below on how to add it to your system. –  micahg May 20 '11 at 6:07

2 Answers 2

Simply search for lightning calendar in Software Center (it's xul-ext-lightning) and install it. Restart thunderbird and you're set.

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Micahg,did as instructed and works a treat - many thanks. –  Andy T May 20 '11 at 9:31
  1. Uninstall Thunderbird in the Ubuntu Software Center.
  2. Open Accessories;Terminal and enter the following command.

sudo apt-get update

3 . Close the Terminal

4 . Reinstall Thunderbird in the Ubuntu Software Center making sure that the Xul-ext-lightning box is Checked.

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