Encrypted APG mail illegible when send to Bat! Mail program.

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What steps will reproduce the problem?
1.Working private/public key pair, generated by PGP4Win
2. Create a mail, using K9 Mail, with APG underneath.
3. Send to a friend using Bat! mail client for Windows.

What is the expected output? What do you see instead?
I am told, decode seems okay. But message(s) come out 'blank' Key decodes, also 
decodes/accepted okay for sign-only mail.

What version of the product are you using? On what operating system?
Android 2.2; K-9 3.003; APG 1.07. Bat! for windows, unsure, but pretty certain, 
current.

Please provide any additional information below.
Use-cases. This k-9, APG, keys have worked fine, to and from, any other friend. 
Which means, another Andorid, as above, or a Thunderbird setup.
This new friend, beginss PGP mail, with this Bat! mail program. I receive 
encoded mail, just fine, at TB desktop, and Android phone. But, in my send, 
while TB desktop works, Android with K-9 and AGP, seems to match key, but 
decryption results in a blank (empty) message at Bat! receiving client.

Original issue reported on code.google.com by martyfra...@gmail.com on 5 Nov 2010 at 7:56

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[deleted comment]

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Same here, but decryption is attempted when the message (sent with Outook 
Express) is received by K-9 v. 3.403. Software versions: Android 2.2 (Build 
2.13.707.2 CL274424) on HTC Desire; APG v1.0.7. The PGP message is 
ASCII-armored and contained in a text message.

Original comment by enzom...@gmail.com on 26 Dec 2010 at 1:34