Digital signing in Thunderbird Portable using an account with copied mail produces messages unverifiable by OpenSSL
Environment: Thunderbird Portable 9.0.1 on Windows XP Pro (32 bit).
Thunderbird Portable is run from the local hard drive (not from a USB one).
Thunderbird Portable has been upgraded from earlier versions gradually.
Scenario:
Installed automatically (from TERENA Personal CA) a personal certificate in Firefox Portable 9.0.1. I created certificate backup and imported into Thunderbird Portable (9.0.1), then I enabled in an account signing and encryption using this certificate. The account includes copied mail. Signed messages sent using this account cannot be verified.