to recreate:
create new LISE item & save
Error message: Item title is empty

issue: 
the auto-generated title is not submitted with the form as the disabled
attribute is set (apparently it's in the spec!)

fix:
in edititem.tpl line 69 remove 'disabled' - readonly does the job :)

<input class="cms_textfield" name="{$actionid}title"
id="{$actionid}title" value="{$title}" size="50" maxlength="255" type="text"
readonly>