Facepalm moment!
I had totally forgotten that I didn’t update some of the language files in 3.2.6.2 so some of the other languages will see error messages in the GUI. I thought I didn’t have any new strings, but it turns out I did (one I added a long time ago).
Sorry about the confusion and thanks to all the recent donors to the project (it really means a lot to me)! 
Update on the Summer of Funding:
Currently we are half way to the first milestone, Thunderbird 3 Tabs. Can’t wait!