Hi everyone, on a Windows 10 machine, an error occurred when trying to open mail attachments. The path to the temporary file that is passed to the appropriate application arrives incomplete. If the filename contains a dot or whitespace, it will be cut at that position: E.g. "path\file.1.pdf" or "path\file 1.pdf" is received as "path\file." or "path\file ". I can confirm that the attachment files exists and can be opened manually from the expected location, e.g. "%appdata%\local\temp\". This must have happened during the last 2 weeks. Before that, everything worked as expected. Windows 10 and Thunderbird are up to date. Do you have a hint what might have caused this and how to fix it?