Tristan Miller

Is this because Enigmail's functionality has now been integrated into Thunderbird?

I have the same problem with OpenJDK 15 on openSUSE Tumbleweed. The problem seems to stem from Issue 101 in xstream. In that issue it's suggested that the problem can be worked around by passing --add-opens java.base/java.lang.reflect=ALL-UNNAMED --add-opens java.base/java.util=ALL-UNNAMED --add-opens java.base/java.text=ALL-UNNAMED --add-opens java.desktop/java.awt.font=ALL-UNNAMED on the command line, though this doesn't work for me. However, directly passing a config file on the command line,...

Yes I did. The problem does not occur when Enigmail is enabled but the message is not signed, nor when Enigmail is disabled.

OK. This also makes it difficult to view messages when Thunderbird is started in safe mode. If TB 60 solves the problem then that's good enough for me (since running in safe mode or uninstalling Enigmail are fairly rare occurrences).

Autocrypt messages are unreadable on Thunderbird without Enigmail

Enigmail adds a couple extra newlines to signed mail

Can't edit budget fields

Still reproducible for me; I used to play prboom-plus every day but haven't been...