Index: kbase.php
===================================================================
--- kbase.php	(revision 14653)
+++ kbase.php	(working copy)
@@ -418,7 +418,7 @@
 
 		$this->defineFields();
 
-		$this->ApplyFieldModifiers(); // should be called only after all fields definitions been set
+		$this->ApplyFieldModifiers(null, true); // should be called only after all fields definitions been set
 		$this->prepareConfigOptions(); // this should go last, but before setDefaultValues, order is significant!
 
 		$this->SetDefaultValues($populate_ml_fields);
@@ -477,18 +477,19 @@
 	 * @access private
 	 * @author Alex
 	 */
-	function ApplyFieldModifiers($field_modifiers = null)
+	function ApplyFieldModifiers($field_modifiers = null, $from_submit = false)
 	{
-		$allowed_modifiers = Array('required', 'multiple');
+		$allowed_modifiers = Array ('required', 'multiple');
 
-		if ($this->Application->isAdminUser) {
+		if ( $this->Application->isAdminUser ) {
 			// can change upload dir on the fly (admin only!)
 			$allowed_modifiers[] = 'upload_dir';
 		}
 
-		if (!isset($field_modifiers)) {
+		if ( !isset($field_modifiers) ) {
 			$field_modifiers = $this->Application->GetVar('field_modifiers');
-			if (!$field_modifiers) {
+
+			if ( !$field_modifiers ) {
 				// no field modifiers
 				return false;
 			}
@@ -496,19 +497,38 @@
 			$field_modifiers = getArrayValue($field_modifiers, $this->getPrefixSpecial());
 		}
 
-		if (!$field_modifiers) {
+		if ( !$field_modifiers ) {
 			// no field modifiers for current prefix_special
 			return false;
 		}
 
-		foreach ($field_modifiers as $field => $field_options)
-		{
-			foreach ($field_options as $option_name => $option_value)
-			{
-				if ( !in_array(strtolower($option_name), $allowed_modifiers) ) continue;
+		$fields = $this->Application->getUnitOption($this->Prefix, 'Fields', Array ());
+		$virtual_fields = $this->Application->getUnitOption($this->Prefix, 'VirtualFields', Array ());
+
+		foreach ($field_modifiers as $field => $field_options) {
+			foreach ($field_options as $option_name => $option_value) {
+				if ( !in_array(strtolower($option_name), $allowed_modifiers) ) {
+					continue;
+				}
+
+				if ( $from_submit ) {
+					// there are no "lN_FieldName" fields, since ApplyFieldModifiers is
+					// called before PrepareOptions method, which creates them
+					$field = preg_replace('/^l[\d]+_(.*)/', '\\1', $field);
+				}
+
+				if ( isset($this->VirtualFields[$field]) ) {
+					$virtual_fields[$field][$option_name] = $option_value;
+					$this->VirtualFields[$field][$option_name] = $option_value;
+				}
+
+				$fields[$field][$option_name] = $option_value;
 				$this->Fields[$field][$option_name] = $option_value;
 			}
 		}
+
+		$this->Application->setUnitOption($this->Prefix, 'Fields', $fields);
+		$this->Application->setUnitOption($this->Prefix, 'VirtualFields', $virtual_fields);
 	}
 
 	/**