No, I'm talking about the firegpg result output window - see screenshot.
This happens because the message I receive is 8bit message.

http://lh3.google.com/image/vadikas/RnxQQ2kzNYI/AAAAAAAAAMY/Nu5TkCHidrk/gpg1.JPG?imgmax=640

Because the decoded message box has no ability to specify 8bit charset and is unicode, the message is displayed with rectangles, and question signs like "???????".
It seems to be a feature request. smile