The mailing list for listmasters using Sympa

[Jean Charles Delepine <address@concealed>]

Hello,

sympa 5.2.3, Debian etch package.
apache2

A moderation mail :

mailto:address@concealed?subject=DISTRIBUTE%20test%2005d83abd3b91f6f9219e199d23006544

This url is translated by imp in :
http://webmail.u-picardie.fr/horde/imp/compose.php?to=sympa%40listes.u-picardie.fr&subject=DISTRIBUTE%2520test%252005d83abd3b91f6f9219e199d23006544&thismailbox=INBOX

The subject in the compose window is :

DISTRIBUTE%20test%2005d83abd3b91f6f9219e199d23006544

And sympa said there's no command in mail.

Where is the bug ? In sympa which should presente an other url or in imp 
which 
should expend the %20 ?

Sincerly,
-- 
> R : Tu vois !            || Jean Charles Delépine - Université de Picardie
> > Q : Tu crois ?          
> > > R : Ça casse l'ordre chronologique de l'échange.
> > > > Q : En quoi répondre au dessus est-il gênant ?