I have actually confirmed this as a bug in Dolphin 7.0.9. I have not checked previous versions.
To fix do the folowing.
Edit administration\menu_compose_admin.php
At about line 275 in the function showEditFormCustom look for this code.
'Icon' => array(
'type' => 'text',
'name' => 'Icon',
'caption' => _t('_adm_ambuilder_Icon'),
'value' => htmlspecialchars_adv( $aItem['icon'] ),
'attrs' => array()
),
Change it to this.
'Icon' => array(
'type' => 'text',
'name' => 'icon',
'caption' => _t('_adm_ambuilder_Icon'),
'value' => htmlspecialchars_adv( $aItem['icon'] ),
'attrs' => array()
),
The uppercase word Icon must be changed to lowercase icon