[imp] nowhere to select encoding method when compose

my horde app version is: horde 4.0.1 stable imp 5.0.1 stable ingo 2.0.1 stable turba 3.0.1 stable and my php version is PHP 5.3.3 When I compose a new message, there is nowhere to select encoding method.

[imp] encoding problem

my horde app version is: horde 4.0.1 stable imp 5.0.1 stable ingo 2.0.1 stable turba 3.0.1 stable and my php version is PHP 5.3.3 I find that when I send a plain text mail, the subject will by encoded, but