<?php
class SomeForm extends sfForm
{
	//..
 
	/**
	 * Return array of current errors
	 *
	 * @return array
	 */
	public function getErrorsArray()
	{
		$errors = $embedded_forms_name = array();
		foreach($this->getEmbeddedForms() as $embedded_form){
			$embedded_forms_name[] = $embedded_form->getName();
		}
		foreach($this as $field){
			if($field->hasError())
			{
				if(in_array($field->getName(), $embedded_forms_name)){
					foreach($field as $field_embedded){
						if($field_embedded->hasError()) $errors[$field->getName().'_'.$field_embedded->getName()] = $field_embedded->getError()->__toString();
					}
				} else {
					$errors[$field->getName()] = $field->getError()->__toString();
				}
			}
		}
		return $errors;
	}
}

//...
foreach ($this as $field) {
	$field->hasError() ? $errors[$field->getName()] = $field->getError()__toString() : null;
}

//...
foreach ($this->getErrorSchema()->getErrors() as $name => $error) {
	$errors[$name] = $error->getMessageFormat();
}