Failed delivery because of content conversion Winmail.dat

I have a client with an existing Exchange 2007 server that is randomly receiving failed delivery 5.6.0 M2MCVT.StorageError; storage error in contect conversion # #

The error occurs when creating the winmail.dat, I've seem this process fail before because of a jpg in a signature, but this is different.  This user is sending from a Blackberry and doesn't have a signature.  Of course its happening to the CEO...

The server only has 3GB's or RAM, I think this might contribute, but if anyone else has any ideas, I'll try all and any.  Thanks,
Diagnostic information for administrators:
Generating server:
#550 5.6.0 M2MCVT.StorageError; storage error in content conversion ##
Original message headers:
Received: from ...........................([]) by
 ...............................([]) with mapi; Fri, 22 May 2009 11:27:00
Content-Type: application/ms-tnef; name="winmail.dat"
Content-Transfer-Encoding: binary
From: ............. <>
To: "''" <>
Date: Fri, 22 May 2009 11:26:59 -0700
Thread-Index: AcnbCuUko95ffFkFQCe4fV/tuVLMmA==
Message-ID: <>
Accept-Language: en-US, en-CA
Content-Language: en-US
X-MS-Has-Attach: yes
X-MS-TNEF-Correlator: <>
MIME-Version: 1.0

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Is the BlackBerry user trying to send a vcard file when he receives this error?
There is a bug that Blackberry has fixed in SP6 MR3
I noticed that "X-MS-Has-Attach: yes" if its a vcard attachment then the link above should solve the problem

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kool-ipAuthor Commented:
No, there's no vcard or signature.  I'm looking into the messages that he replied to, to see if there are any consistancies.  
He is definitely trying to send an attachment correct?
What kind of attachment is he trying to send?

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kool-ipAuthor Commented:
I'll do the BB patch too...  It could wind up being the same problem anyway.  Thanks.
kool-ipAuthor Commented:
I'll do the BB patch too...  It could wind up being the same problem anyway.  Thanks.
kool-ipAuthor Commented:
he told me that there is no attachment, but he might not realize that a picture in someone elses sig is still an attachment.  I'll have to look at the origional message in his sent items.
If that does not work, the next thing to try is to resend the service book to the bb device.  If that does not work delete all the service book entries and resend again, wait 20 mins and then test.
kool-ipAuthor Commented:
Turns out the Blackberry maintenance release was already done.  I still thing this is a Blackberry issue though...  I'm going to look at upgrading to BES version 5.
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