Bug#1150846: Attaching file to tbird messages

[Paul van der Vlis]

I've also seen this problem at 3 different customers, all using MATE 
desktop and with Debian 13 and Thunderbird 140.17.0esr. But it's not 
everywhere, many other people (like myself) don't have this problem. 
Strange...

Using the "troubleshoot mode" in Thunderbird gives the same problem. And 
if I start Thunderbird from the commandline I don't get extra 
information in the terminal.

A workarround is to drag and drop an attachment from the filemanager 
into the message.