the string you posted includes carriage returns, this needs to be added to the allowed character for alpha numeric validation event_description field:
back to the default value coming from the recordset or the validated entries:
you need to update the failed redirect in the server validations behavior to redirect back to itself, but include a querystring variable.
for example, the page you sent me is named:
so in the server validation server behavior, set the failed redirect to:
here is an example of the code for the default value of the event_location filed to use:
<?php echo(isset($_GET['valid ValidatedField("eventupdateCopy_424","event_location"):$row_eventset['event_location']); ?>