According to RFC 2047: [--- QUOTE (near top of page 7 of RFC 2047) ---] Ordinary ASCII text and 'encoded-word's may appear together in the same header field. However, an 'encoded-word' that appears in a header field defined as '*text' MUST be separated from any adjacent 'encoded-word' or 'text' by 'linear-white-spac [---- END OF QUOTE ----] I occationally recieve messages written in Mozilla mail with headers like this: X-Mailer: Mozilla 4.78 [en] (X11; U; Linux 2.4.9-31 i686) Subject: Re: [NOVICE] =?iso-8859-1?Q?Hj=E6lp?=, grafikken spiller ikke! The comma following the encoded word in the Subject causes my MUA (Evolution) to NOT decode it - and rightly so as it isn't correctly encoded according to RFC 2047.
Ahem... What you describe seems to be caused by Netscape 4.78, not Mozilla. I just tried with Mozilla 1.3b and it seems fine: User-Agent: Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.3b) Gecko/20030210 Subject: pokus =?ISO-8859-2?Q?as=F9=EC=B9qw=2C_asd?= Marking INVALID.