Confirmed list trash

Hi, everyone.

I've been using TMDA for a while stable and unstable version.
Now I encoutered a bug that I think caused by TMDA.
In confirmed list getting some weird strings like:
M80-HC89W;$UI_$87DBBQ0\"@T.WP4`S-1@4PQ?NFNII3
VI$IUO[\"%LRLWH@6X2EC_R4K.2?+4LC+IM2[+7^__SK6
and so on....

I check the contence of confirmed list with Exim directly - and it starts
complaining about wrong lines in confirmed.
In logs it seen as:

2005-06-23 20:29:03 1DkJTZ-0007zK-Li == [email protected] R=tmda T=tmda_pipe defer
(-52): Retry time not yet reached
=> 2005-06-23 20:29:09 1DlesO-00046p-8z unknown lookup type ""

2005-06-23 21:54:01 1DkJTZ-0007zK-Li == [email protected] R=tmda T=tmda_pipe defer
(-52): Retry time not yet reached
=> 2005-06-23 21:55:18 1DlgDk-000579-85 unknown lookup type "M80-HC89W"

2005-06-24 03:29:00 1DkJTZ-0007zK-Li == [email protected] R=tmda T=tmda_pipe defer
(0): Child process of tmda_pipe transport
returned 75 (could mean temporary error) from command: /usr/bin/python
=> 2005-06-24 03:33:26 1DllUz-00075p-Fd unknown lookup type ""

Errors marked with '=>'. As you can see before Exim throws an error, there
is call to TMDA, after this call there are trash in confirmed file.
I cleared confirmed by hand, but after TMDA call again - there is trash.
If some one encouters this problem before - please explain me what happend.

Unfortunatly I don't save the message that goes thru TMDA all three times.
May be the problem is in message, but in this case TMDA must check the
correctness of mail message, am I right?

I'm using TMDA 1.4 (Python 2.2.3) and Exim as MTA. TMDA called from pipe
transport.
System is FC2.

WBR, Dmitry.