diff -Naur evolution-rss-0.1.4/src/rss.c evolution-rss-0.1.4-mod/src/rss.c
--- evolution-rss-0.1.4/src/rss.c	2009-08-26 12:00:09.000000000 +0300
+++ evolution-rss-0.1.4-mod/src/rss.c	2009-09-16 12:30:32.000000000 +0300
@@ -3659,8 +3659,13 @@
 		nname = g_strdup(new_name);
 	gchar *orig_name = g_hash_table_lookup(rf->feed_folders, oname);
 	if (!orig_name) {
-		if (valid_folder)
-			return 0;
+		if (valid_folder) {
+			gchar *ofolder = lookup_original_folder(old_name);
+			if (!ofolder)
+				return 0;
+			else if (!lookup_key(ofolder))
+				return 0;
+		}
 		g_hash_table_replace(rf->feed_folders, g_strdup(nname), g_strdup(oname));
 	} else {
 		g_hash_table_replace(rf->feed_folders, g_strdup(nname), g_strdup(orig_name));