Error messages being displayed

Just a question.  When something fails on the decryption, encryption, etc. why doesnt firegpg just display the error message that gpg states at the command line.  For example, I tried to decrypt an email that I didnt have the private key.  At the command line I get:

gpg: WARNING: using insecure memory!
gpg: please see http://www.gnupg.org/faq.html for more information
gpg: encrypted with 4096-bit ELG-E key, ID 698F7669, created 2007-11-14
gpg: decryption failed: secret key not available

The command line tells me the secret key is not available.

However when I try the same process in Firegpg, I get a popup box that states:
Decrypting Failed.  Unknown error

The Error is known however.  Cant you just parse the output given from gpg on the command line?