Version of outlook? Do you have all updates installed?
Did you empty the securetemp folder?
http://www.slipstick.com/OUTLOOK/securetemp.htm
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Diane Poremsky [MVP - Outlook]
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Let's Really Fix Outlook 2010
http://forums.slipstick.com/forumdisplay.php?f=34
"Ed" <(E-Mail Removed)> wrote in message
news:133D1561-BC78-42DE-A723-(E-Mail Removed)...
> Dear All,
>
> I found a case about attachment problem. I have copied a attachment A and
> B
> (different content) from other email and then sent. In my sent items, i
> can
> find the attachemnt name shown A and B.
>
> However, when i opened a attachment B, the content is same as attachment
> A!!!. And i confirmed the email receiver also found the 2 attachment s
> with
> different file name but same content.
>
> It's the bug of Outlook right?
>
> Best Regards,
> Ed