Version:           1.9.1 (using KDE 3.5.1 Level "a" , SUSE 10.1)
Compiler:          Target: i586-suse-linux
OS:                Linux (i686) release 2.6.16.27-0.9-default

Kmail seems to insert ">" characters when receiving.

When sending a mail to myself like (body):
----- start --------
from twinklephone.com/about:
>Standards support
>  Twinkle supports the following standards (some partial).
> RFC 2327 - SDP: Session Description Protocol
> RFC 3264 - An Offer/Answer Model with the Session Description Protocol (SDP)
RFC 3264 is _not_ marked "partial", so usually you can expect twinkle to be 
fully conform to standard.

more text...
-------- end --------

then the received msg shows with an additional ">" in the first line. Like:
----- start --------
>from twinklephone.com/about:
>Standards support
>  Twinkle supports the following standards (some partial).
[...]
-------- end --------

This ">" is also visible in "message code" (V). But when others are CC:ed and are quoting my msg in their answer, it looks ok. Like:
----- start --------
[some OP's text...]
On 6/19/07, joerg <joerg.xxx@xmx.de> wrote:
>
> from twinklephone.com/about:
> >Standards support
> >  Twinkle supports the following standards (some partial).
[...]
-------- end --------

So i think this ">" is inserted while *receiving* the msg.
In the same msg the same effect (first non quote line in a quote block is quoted) occurs a second time.

WHEN I SIGN SUCH MESSAGE, THE SIGNATURE in rcvd msg IS SAID TO BE INVALID. (msg modified?)