Rated 5 out of 5 stars

I'm also experiencing the 2.6.1 vs. TB24 incompatilibity. Linux Mint 13, using Google Calendar Provider. Calendar just flat out was empty and wouldn't connect. Dropped back to 2.6, worked perfectly again. Otherwise, though, Lightening is a great plugin, though I admit I'd love to have a working provider for Microsoft Exchange so I could view my office calendar in TB as well.

This review is for a previous version of the add-on (2.6.1).