Follow-up Erases Sender Name

I have three emails that the Sender has been erased after I used the Quick Flag option under Follow-up.

I have many emails that I’ve used the same option and the Sender is still there.

Is there a way to fix this?

Regards,

John


Update 10/21/2008 17:35:


In discussing this with a colleague we noticed that this occured only on external emails. Although there are instances where external emails have the Sender there.