on my gmail account, when replying to an email thread, I get the $SUMMARY message in a popup dialog. The full text reads: Could not queue message for sending Signature failed: secret key specification is ambiguous I suspect that this is because I have two keys in my keyring which both have clark.williams@gmail.com as the listed email address. I believe this works ok on regular composes because I selected the "Specify key manually" preference and selected the appropriate key id. Guessing that reply doesn't use that logic?
Ah, meant to add that this is on Fedora 16, using the Fedora package. Loaded plugins: Dillo PGP/Core PGP/MIME Python RSSyl
Do you have another account using the same email address, but without using "Specify key manually" in its GPG preferences ?
Can you attach a --debug output ?
I had a PEBCK, because I had two keys on my keyring with the same email address. I removed one of them and have no issues signing messages now. Sorry for the noise.
That's not a real fix