Problem was fixed by 4.5 BETA !

avast! 4.5 beta inserted them into a mail header:

X-Antivirus: avast! (VPS 0443-3, 2004/10/22), Inbound message
X-Antivirus-Status: Clean

also the note by avast! was come back !
Thank you very much.

PS
It was success to switch SUI to skinless, and back to UI with a skin by setting.