[Enigmail] Problems with decrypting PGP/MIME messages

[Martin Fluch]

Hi!

I'm using the most current Thunderbird (2.0.0.14) and the most current 
EnigMail (0.95.6), on two different systems, Ubuntu 8.04 and Mac OS X 
10.5.3.

In both cases I have the same problem: I cannot decrypt PGP/MIME 
messages. The fun part is, that a while ago I still could, but now I 
have problems with messages which I know I had once read, but cannot 
read them anymore. EnigMail/Thunderbid just don't recognice them anymore 
as as encrypted messages and just display an empty message together with 
two attachments: "PGP/MIME version identification" and "encrypted.asc".

I first encountered it with some messages send by a friend of mine. And 
then I tested it with myself as follows:
Sending a message to myself I without using the PGP/MIME option I can 
decrytp without any problems. But sending a message to myself with 
PGP/MIME .. I get the above behaviour. On both machines.

Is this problem known?
Any sollution except not using PGP/MIME?

Thanks in advance,
- Martin