I have observed this problem on a 1.8d LISTSERV and I am not sure if this has already been solved in 1.8e: When the subject of a message contains an umlaut, a mail user agent may use an encoded-word since 8bit characters are not allowed in mail headers. A member of a list who has set the subjecthdr option will receive the subject line with a subject-tag. When he replies to such a message, his mail user agent may decide to embed the subject-tag into a new encoded-word. This way, LISTSERV (1.8d) may not be able to detect that the subject-tag is already present and may duplicate it. Additionally, the subject-tag will appear in the archive file of the list. Example: Subject: =?ISO-8859-1?Q?Re=3A_=5BNONUKA-L=5D_L=F6schen_von_AIESEC_Listen?= This is a subject line with an umlaut "Ö" and a subject-tag [NONUKA-L] embedded in an encoded-word which comprises the complete field-body of the subject field. This line appeared in the archive file "nonuka-l.log0409". Has anybody observed a similar problem on a 1.8e LISTSERV? Kind regards, Siegfried