Rated 2 out of 5 stars

Upgrade breaks functionality. Next working version for me: http://ftp.mozilla.org/pub/mozilla.org/calendar/lightning/nightly/2013-10-14-00-40-02-comm-aurora/lightning-2.8a2.en-US.linux-x86_64.xpi

This review is for a previous version of the add-on (2.6).