diff --git a/todo.md b/todo.md
index 704e51b..636ad99 100644
--- a/todo.md
+++ b/todo.md
@@ -31,7 +31,6 @@ super ultra important things:
 (test:17575): Gtk-CRITICAL **: gtk_device_grab_remove: assertion 'GDK_IS_DEVICE (device)' failed
 ```
 	figure out why
-- Cocoa: https://developer.apple.com/library/mac/documentation/cocoa/Conceptual/NSScrollViewGuide/Articles/Creating.html#//apple_ref/doc/uid/TP40003226-SW4 check that we're obeying pixel alignment rules in Listbox and Area (and in the future too, possibly in the shared scrollview code)
 - make sure the preferred size of a Listbox is the minimum size needed to display everything on all platforms (capped at the screen height, of course?)
 	- same for Area, using the Area's size (this will be easier)
 - make sure the image drawn on an Area looks correct on all platforms (is not cropped incorrectly or blurred)