I agree, this was a very annoying bug as there are no error messages. Keys are just missing, and importing the old pubring.gpg through both Seahorse and Enigmail interfaces doesn't work.
The "bug" also affects Enigmail.
There is a nice description here regarding how to export your old pubring.gpg to pubring.kbx, retaining owner trust: http://stackoverflow.com/a/34221494/405682
I agree, this was a very annoying bug as there are no error messages. Keys are just missing, and importing the old pubring.gpg through both Seahorse and Enigmail interfaces doesn't work.
The "bug" also affects Enigmail.
There is a nice description here regarding how to export your old pubring.gpg to pubring.kbx, retaining owner trust: http:// stackoverflow. com/a/34221494/ 405682