[TYPO3-templavoila] TCEforms date field renders as sequence of 10 numerics instead of formated date in FE & BE

[Christophe Stadler]

Following up on a previous post of mine i have tried to find a solution to
this and am stuck. 

Whereas the date is formated correctly in the backend form, the front end
displays random numeric characters ..

 .. so instead of 04.10.2007 i get 1191448800

But the weird thing is that when i edit the FCE again the date appears
correctly in the fields. But in the general backend overview and in the
frontend the dates are replaced with these numerics.

I have looked at the database and the date is contained in the
tx_templavoila_flex field:

[...]

<field index="field_eventdate">
                                        <value
index="vDEF">1191448800</value>
                                    </field>

[...]

Here is the corresponding part of the xml from the FCE template DS:

                            <field_eventdate type="array">
                                <tx_templavoila type="array">
                                    <title>Date</title>
                                    <sample_data type="array">
                                        <numIndex index="0"></numIndex>
                                    </sample_data>
                                    <eType>input</eType>
                                    <proc type="array">
                                        <HSC type="integer">1</HSC>
                                    </proc>
                                </tx_templavoila>
                                <TCEforms type="array">
                                    <config type="array">
                                        <type>input</type>
                                        <size>10</size>
                                        <eval>date</eval>
                                    </config>
                                    <label>Date</label>
                                </TCEforms>
                            </field_eventdate>

I'm mystyfied ...