I have just upgraded (new machine) to Office 2007 from 2003. In my 2003 Excel program I would send a work book to e-mail from the shortcut button (send to email). It would open a new message and attach the workbook right away. With my new 2007, the button is still there but when you click it the new message appears, with the attachment, but when you click send it hangs for 30-40 seconds before it sends it. Then the workbook I sent is minimized on the task bar and will not come up. I have to close it (right click) and reopen it. Files sent to e-mail via the right click 'sent to' command act the same way. However if you attach a file within the message there is no hang up. I checked and I have all the patches I can find. Including sp1.