I'm affected too and thanks to the users here - especially piraten-kris - we got an overview about the workarounds.
It was a bad suprise to start Thunderbird after regular Ubuntu update with missing core-functionality. And it is very hard and time consuming for an user to discover which SW-part is responsible for the misfunction (normally you start with the plugin or the host program).
Therefore it was a surprise that Ubuntu is responsible for the error and it is pretty annoying that automatically the responsibility will be denied ("it's not our bug...").
Ubuntu must really asap correct this bug, because it breaks core functionality of an application which Ubuntu take care of!
I'm affected too and thanks to the users here - especially piraten-kris - we got an overview about the workarounds.
It was a bad suprise to start Thunderbird after regular Ubuntu update with missing core-functionality. And it is very hard and time consuming for an user to discover which SW-part is responsible for the misfunction (normally you start with the plugin or the host program).
Therefore it was a surprise that Ubuntu is responsible for the error and it is pretty annoying that automatically the responsibility will be denied ("it's not our bug...").
Ubuntu must really asap correct this bug, because it breaks core functionality of an application which Ubuntu take care of!