gpg --verify email.eml

[shmick at riseup.net]

lately some recipients have not been able to decrypt some emails

ie. some can decrypt them; some can't

every time i send a signed+encrypted email, enigmail reports signature
verification failed but the status bar is green !

but when i send just signed emails, no problem with sig verification
(status bar is still green)

if thunderbird and enigmail were used to construct emails, and  enigmail
debug output reports everything ok:

[GNUPG:] GOODSIG
[GNUPG:] VALIDSIG
[GNUPG:] TRUST_ULTIMATE
[GNUPG:] DECRYPTION_OKAY
[GNUPG:] GOODMDC
[GNUPG:] END_DECRYPTION

but

gpg --verify -vv email.eml
gpg: armor: BEGIN PGP MESSAGE
gpg: armor header: Charset: utf-8
:pubkey enc packet: version 3, algo 1, keyid 0000000000000000
	data: [4093 bits]
gpg: verify signatures failed: unexpected data

how should i proceed to debug this ?

i downgraded enigmail to enigmail 1.6 because i couldn't sign or encrypt
at all with the recent update