Attachments corrupted after sending

[Massimo Conter]

-I write a message and add an attachment.
-I push Send Later and then check if the attachment is OK. It is!
-I send the message
-I check in Sent Messages and the attachment is corrupted. The receiver 
of the message get a corrupted zip file too!

Win98 SE
Mozilla/5.0 (Windows; U; Win98; en-US; rv:0.9.4+) Gecko/20010912
Build ID: 2001091203 (It's a nightly build!!)

thanks
                maxx