Index: branches/RC/core/units/general/cat_tag_processor.php
===================================================================
diff -u -N -r10274 -r10455
--- branches/RC/core/units/general/cat_tag_processor.php	(.../cat_tag_processor.php)	(revision 10274)
+++ branches/RC/core/units/general/cat_tag_processor.php	(.../cat_tag_processor.php)	(revision 10455)
@@ -143,6 +143,12 @@
 			// pass params to block with tab content
 			$params['name'] = $params['render_as'];
 			$params['prefix'] = trim($this->Prefix.'.'.($tab_params['special'] ? $tab_params['special'] : $this->Special), '.');
+
+			$prefix_append = $this->Application->GetVar('prefix_append');
+			if ($prefix_append) {
+				$params['prefix'] .= $prefix_append;
+			}
+
 			$params['cat_prefix'] = trim('c.'.($tab_params['special'] ? $tab_params['special'] : $this->Special), '.');
 			$params['tab_mode'] = $tab_params['mode'];
 			$params['tab_dependant'] = $tab_params['dependant'];