Comment # 3 on bug 1093836 from Andreas Stieger

(In reply to Manfred Hollstein from comment #0)
> When I click on an encrypted message received from someone whose public 
> key is already stored in my keyring, I now only see the following:
> 
>   Enigmail: Error - no matching secret found to decrypt message

Someone's public key has nothing to do with decryption. The problem is locating
the secret key to decrypt the message, usually your own.

> From reading the enigmail's changelog, it may be
> caused by the old gpg2 version (2.0.24-8) available on Leap 42.3.

Which changelog entry is that exactly, please?