Copying attachments to another email gives odd results

Hi,

Using Outlook 2003 SP3 using an updated Windows XP SP3

When I copy 5 attachments from one email and paste them into another, it
some times pastes the same attachment for all 5 but uses the correct name. I
end up with an email with 5 different names, but they're all the same file.

Saving them locally then reattaching seems to prevent this and it happens in
rare situations. Is this a known issue?