[TYPO3-mvc] Tx_Extbase_MVC_Exception_InfiniteLoop - again

[Thilo Schneider]

Hey all,

After hours of research I still do not manage to get rid of on Infinite 
Loop Exception. Probably I'm just plain stupid, but that is for you to 
decide ;)

I have got the following create Action:
/**
	 * create action
	 *
	 * @param Tx_Gemeindenachrichten_Domain_Model_Termin $newTermin
	 * @param string $vonhour
	 * @param string $vonminute
	 * @param string $bishour
	 * @param string $bisminute
  	 * @param string $datum
	 * @return string
	 * @dontvalidate
	 */
	public function createAction(Tx_Gemeindenachrichten_Domain_Model_Termin 
$newTermin = NULL, $vonhour, $vonminute, $bishour, $bisminute, $datum)

The action is called by the following form:
<f:form method="post" action="create" controller="Termin" 
name="newTermin" object="{newTermin}">
	<f:form.hidden name="datum" 
value="<f:format.date>{tag.datum}</f:format.date>"/>						
	<f:form.textbox name="vonhour" class="edit"/>
	<f:form.textbox name="vonminute" class="edit"/>
	<f:form.textbox property="titel" id="titel" class="edit"/>
	<f:form.submit name="submitbutton" value="Ok"/>
	<f:form.textbox name="bishour" class="edit"/>:
	<f:form.textbox name="bisminute" class="edit"/>
	<f:form.textarea property="beschreibung" id="content"/>
</f:form>

I have read quite a lot that the exception I get is a validation error - 
but the @dontvalidate does not solve the problem.

Thank you for your help!

Cheers
Thilo Schneider