diff -r d88020cd4d8a src/settings_gui.cpp
--- a/src/settings_gui.cpp	Mon Nov 17 21:13:05 2008 +0100
+++ b/src/settings_gui.cpp	Mon Nov 17 21:57:05 2008 +0100
@@ -723,6 +723,8 @@
 		case PEF_SETTING_KIND:
 			return 1;
 		case PEF_SUBTREE_KIND:
+			if (d.sub.folded)
+				return 1;
 			return 1 + d.sub.page->Length();
 		default: NOT_REACHED();
 	}