In administrator\components\com_k2\tables\k2item.php they have defined this:
var $id = null;
var $title = null;
var $alias = null;
var $catid = null;
var $published = null;
var $introtext = null;
var $fulltext = null;
var $image_caption = null;
var $image_credits = null;
var $video = null;
var $video_caption = null;
var $video_credits = null;
var $gallery = null;
var $extra_fields = null;
var $extra_fields_search = null;
var $created = null;
var $created_by = null;
var $created_by_alias = null;
var $modified = null;
var $modified_by = null;
var $publish_up = null;
var $publish_down = null;
var $checked_out = null;
var $checked_out_time = null;
var $trash = null;
var $access = null;
var $ordering = null;
var $featured = null;
var $featured_ordering = null;
var $hits = null;
var $metadata = null;
var $metadesc = null;
var $metakey = null;
var $params = null;
var $plugins = null;
var $language = null;
they should have introtext and fulltext - just as the case with hotspots.
Regards,
Daniel