diff --git a/TODO.md b/TODO.md
index 28243421..907b7f3e 100644
--- a/TODO.md
+++ b/TODO.md
@@ -35,6 +35,10 @@
 - make sure complain()s don't have \n at the end; add one on each platform
 	- add a `[libui]` to the beginning of the message
 - figure out what to do on Windows and GTK+ if we don't have menus but the user wants a menubar (zero-height widget? don't bother? complain?)
+- bin.c
+	- find a way to consolidate the duplicate code across OSs
+	- find a way to move the has parent check at the beginning of binDestroy()
+	- determine whether or not margins count in preferredSize() when there is no main control
 
 ultimately:
 - add some sort of runtime type checking
diff --git a/darwin/bin.m b/darwin/bin.m
index a1c6a978..e8b7dd46 100644
--- a/darwin/bin.m
+++ b/darwin/bin.m
@@ -15,7 +15,6 @@ void binDestroy(uiControl *c)
 {
 	struct bin *b = (struct bin *) c;
 
-	// TODO find a way to move the parented check here
 	// we can't check for an OS parent here because what we're working with with bin isn't subviews but rather content views (at least I think... TODO)
 	// don't chain up to base here; we need to destroy children ourselves first
 	if (b->mainControl != NULL) {
@@ -32,7 +31,6 @@ void binPreferredSize(uiControl *c, uiSizing *d, intmax_t *width, intmax_t *heig
 	struct bin *b = (struct bin *) c;
 	intmax_t marginX, marginY;
 
-	// TODO have the margins count even if no control?
 	if (b->mainControl == NULL) {
 		*width = 0;
 		*height = 0;
diff --git a/unix/bin.c b/unix/bin.c
index 6ffe79c0..3fe47d5c 100644
--- a/unix/bin.c
+++ b/unix/bin.c
@@ -1,8 +1,6 @@
 // 28 april 2015
 #include "uipriv_unix.h"
 
-// TODO find a way to consolidate duplicate code across OSs
-
 struct bin {
 	uiContainer c;
 	void (*baseDestroy)(uiControl *);
@@ -18,7 +16,6 @@ void binDestroy(uiControl *c)
 	struct bin *b = (struct bin *) c;
 	GtkWidget *binWidget;
 
-	// TODO find a way to move the parented check here
 	// ensure clean removal by making sure the bin has no OS parent
 	binWidget = GTK_WIDGET(uiControlHandle(uiControl(b)));
 	if (gtk_widget_get_parent(binWidget) != NULL)
@@ -38,7 +35,6 @@ void binPreferredSize(uiControl *c, uiSizing *d, intmax_t *width, intmax_t *heig
 	struct bin *b = (struct bin *) c;
 	intmax_t marginX, marginY;
 
-	// TODO have the margins count even if no control?
 	if (b->mainControl == NULL) {
 		*width = 0;
 		*height = 0;
diff --git a/windows/bin.c b/windows/bin.c
index 66c2fb1f..ff7ec287 100644
--- a/windows/bin.c
+++ b/windows/bin.c
@@ -16,7 +16,6 @@ void binDestroy(uiControl *c)
 	struct bin *b = (struct bin *) c;
 	HWND hwnd;
 
-	// TODO find a way to move the parented check here
 	// ensure clean removal by making sure the bin has no OS parent
 	hwnd = (HWND) uiControlHandle(uiControl(b));
 	if (GetAncestor(hwnd, GA_PARENT) != NULL)
@@ -36,7 +35,6 @@ void binPreferredSize(uiControl *c, uiSizing *d, intmax_t *width, intmax_t *heig
 	struct bin *b = (struct bin *) c;
 	intmax_t marginX, marginY;
 
-	// TODO have the margins count even if no control?
 	if (b->mainControl == NULL) {
 		*width = 0;
 		*height = 0;