Today I installed Thunderbrid 15.0 from the Mozilla repo for my 12.1 x86_64/KDE 4.9 system
On startup, Tbird said Lightning (previously used) 1.6 was not compatible and downloaded Lightning 1.7.
Everything started OK, but no calendar display. I use Google Calendar via the Provider for Google Calendar v 0.13.
A quick Google of the problem found others having similar issue.
For now, I backed Tbird down to 14.0 with YAST, removed Lightning 1.7 and installed Lightning 1.6 from HERE
All is well.
I have not seen any other fixes as yet.
Thanks for the tip.
For readers, you will find the Google Provider v .16 update HERE
After upgrading to TBird 15 and starting it, it will automatically detect that Lightning is not compatible, offer to search, find and install Lightning 1.7.
On restart - Lightning calendar but no (Google) calendar items displayed.
Download Google Provider .16 manually from the above URL.
In TBird, select Tools-Add-Ons
Open the dropdown menu under the wrench, upper right quadrant of the window, and select “Install Add-on from File”.
Navigate to the location it was downloaded to, select the downloaded .xpi file and Open it
The new version .16 will overwrite what you have installed (I had v.13), no need to remove or disable the old one.
I assume the Google Provider .xpi file lacks the version compatibility information which enables the automatic detection, such as what occurs with Lightning.
Anyway, all is well again with TBird 15.0 running.
Be careful. I did not backup my contacts BEFORE following this tip and now I have data missing, duplicates. Basically I had contacts “grouped” in a way that made since to me now stuff is everywhere and can’t find some of my contacts. MAN!