Inline signed messages not verification problem - 'wrong signature'

Hi all,

I'm new here and I did look around and searched some to see if my problem was addressed in another thread.  It would seem that this is likely not the case.

I'm using FireGPG v 0.7.5 with FireFox v3.0.8 on an iMac.  I've been having problems with signatures verifying OK.  I'm working with my email via a Google Apps account.

I also use ThunderBird and Enigmail for GnuPG support and this works well.  All inline signatures have been verifying just fine with ThunderBird/Enigmail when I access my Google Apps account with IMAP.  However, with FireGPG, the same signatures all come up with a 'Wrong Signature' error.  Just to be sure, I've copied some of the messages from the GMail interface to clipboard and verified just fine, the clipboard contents using GPG Tools.

Any suggestions?