TB 13 + enigmail + GPG 1.4.12 error

Hi all,

I'm using TB 13.01 portable + Enigmail + GPG for Thunderbird Portable 1.4.12 and it works fine, but sometimes when I receive a crypted mail instead it shows the green bar with the valid certified in the securety information, it shows the green bar with something like "gpg.exe
gpg: cabeçalho de armadura inválido:  \n gpg: invalid radix64 character A0 skipped gpg: encrypted with 2048-bit RSA key, ID 5F882BD2, created 2012-06-18 gpg: Signature made 06/18/12 11:30:54 using RSA key ID XXXXX
gpg: Good signature from "XXXXXX".

Most of time it works fine, but sometimes i get that error. The message is decrypted right, and if I open with the regular non portable thunderbird it shows the right securety information and message.

Is there a way to fix that ???

Thanks.