diff --git a/ChangeLog b/ChangeLog
index 9e111b5f2..df45d4b71 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2010-03-25  Mike Kestner  <mkestner@novell.com>
+
+	* gdk/Rectangle.custom: off-by-one in Right/Bottom. [Fixes #591148]
+
 2009-12-28  Mike Kestner  <mkestner@novell.com>
 
 	* glib/glue/Makefile.am: fix a copy/paste issue.
diff --git a/gdk/Rectangle.custom b/gdk/Rectangle.custom
index 143d22c03..e17fc47ed 100644
--- a/gdk/Rectangle.custom
+++ b/gdk/Rectangle.custom
@@ -121,10 +121,10 @@ public int Top {
 	get { return Y; }
 }
 public int Bottom {
-	get { return Y + Height; }
+	get { return Y + Height - 1; }
 }
 public int Right {
-	get { return X + Width; }
+	get { return X + Width - 1; }
 }
 public int Left {
 	get { return X; }