diff --git a/stdwndclass_windows.go b/stdwndclass_windows.go
index 17784d0..3f52ea5 100644
--- a/stdwndclass_windows.go
+++ b/stdwndclass_windows.go
@@ -75,8 +75,8 @@ func stdWndProc(s *sysData) func(hwnd _HWND, uMsg uint32, wParam _WPARAM, lParam
 type _WNDCLASS struct {
 	style				uint32
 	lpfnWndProc		uintptr
-	cbClsExtra		int
-	cbWndExtra		int
+	cbClsExtra		int32		// originally int
+	cbWndExtra		int32		// originally int
 	hInstance			_HANDLE
 	hIcon			_HANDLE
 	hCursor			_HANDLE
diff --git a/todo.md b/todo.md
index 4a92c36..7713d99 100644
--- a/todo.md
+++ b/todo.md
@@ -27,8 +27,9 @@ important things:
 super ultra important things:
 - for some reason events are now delayed on windows
 - the windows build appears to be unstable:
-	- 64-bit doesn't work, period: it crashes in malloc in wine with heap corruption warnings aplenty during DLL loading; in windows 7 CreateWindowExW complains about an unregistered window class, yet the RegisterClassW appears to have succeeded and examining the stack in WinDbg indicates the correct class name is being sent (see below)
+	- 64-bit doesn't work, period: it crashes in malloc in wine with heap corruption warnings aplenty during DLL loading; in windows 7 it works fine
 	- 32-bit: it works now, but if I save the class name converted to UTF-16 beforehand, wine indicates that the class name is replaced with the window title, so something there is wrong...
+- on 64-bit windows 7 comboboxes don't show their lists
 - handle in-library panics (internal errors) by reporting them to the user
 - david wendt is telling me he's getting frequent crashes on his end with the GTK+ amd64 build...
 	- I get soft deadlock if I mash the Click Me button repeatedly
diff --git a/unmigrated/stdfont_windows.go b/unmigrated/stdfont_windows.go
index 1ba086c..255013a 100644
--- a/unmigrated/stdfont_windows.go
+++ b/unmigrated/stdfont_windows.go
@@ -30,17 +30,17 @@ type LOGFONT struct {
 
 type NONCLIENTMETRICS struct {
 	cbSize			uint32
-	iBorderWidth		int
-	iScrollWidth		int
-	iScrollHeight		int
-	iCaptionWidth		int
-	iCaptionHeight		int
+	iBorderWidth		int32		// originally int
+	iScrollWidth		int32		// originally int
+	iScrollHeight		int32		// originally int
+	iCaptionWidth		int32		// originally int
+	iCaptionHeight		int32		// originally int
 	lfCaptionFont		LOGFONT
-	iSmCaptionWidth	int
-	iSmCaptionHeight	int
+	iSmCaptionWidth	int32		// originally int
+	iSmCaptionHeight	int32		// originally int
 	lfSmCaptionFont	LOGFONT
-	iMenuWidth		int
-	iMenuHeight		int
+	iMenuWidth		int32		// originally int
+	iMenuHeight		int32		// originally int
 	lfMenuFont		LOGFONT
 	lfStatusFont		LOGFONT
 	lfMessageFont		LOGFONT