[Bug 36735] decrypted message not shown

[stefanlew]

Public bug reported:
https://launchpad.net/malone/bugs/36735

Affects: evolution (Ubuntu)
       Severity: Normal
       Priority: (none set)
         Status: Unconfirmed

Description:
I recieve an email from a friend using Apple Mail. The message is encrypted with gpg.
I have to enter my passphrase but then the message doesn't show up. 
There's only an attachment with the decrypted text and I have to save it and open it with a text editor to read it.
http://lew.funpic.de/zeugs/gpgproblem1.png

If I write to myself, it works perfectly.
http://lew.funpic.de/zeugs/gpgproblem2.png

I'm using Dapper Flight 5 with the latest evolution packages.