Index: trunk/src_plugins/fontmode/preview.c
===================================================================
--- trunk/src_plugins/fontmode/preview.c	(revision 38379)
+++ trunk/src_plugins/fontmode/preview.c	(revision 38380)
@@ -344,6 +344,8 @@
 	else /* adding a new entry */
 		htsi_insert(&fontedit_src->entity_tbl, ed2.name, ed2.val);
 
+	fontedit_src->entity_tbl_valid = 1;
+
 	fmprv_pcb2preview(ctx);
 }
 
@@ -430,6 +432,8 @@
 	else /* adding a new entry */
 		htkc_insert(&fontedit_src->kerning_tbl, key, ed2.val);
 
+	fontedit_src->kerning_tbl_valid = 1;
+
 	free(ed2.name);
 	fmprv_pcb2preview(ctx);
 }