diff --git a/docs/rh-log.txt b/docs/rh-log.txt
index a3aee8d12..d2838c2b0 100644
--- a/docs/rh-log.txt
+++ b/docs/rh-log.txt
@@ -1,4 +1,13 @@
 December 28, 2006
+- Fixed: The SDL input code must convert the event.data1 to uppercase.
+- Added more resolution options when playing windowed under SDL.
+- Changed SDL mouse handling to be basically identical to the (non-DirectInput)
+  Win32 code. The mouse is polled periodically and constantly warped to the
+  center of the window. Despite what the SDL docs specify, SDL_WM_GrabInput()
+  is apparently no longer a reliable means of obtaining continuous relative
+  mouse motion events.
+- Fixed: The non-Windows implementation of I_FindClose() did not check for -1
+  handles.
 - Fixed all the warnings from GCC 4.2, including a handful that were present in
   older GCCs.
 - Fixed: The VC++ project was not set up to redefine RM using del in
diff --git a/src/sdl/i_input.cpp b/src/sdl/i_input.cpp
index 535e2addc..8bce0630c 100644
--- a/src/sdl/i_input.cpp
+++ b/src/sdl/i_input.cpp
@@ -224,6 +224,59 @@ static void I_CheckGUICapture ()
 		}
 	}
 }
+
+static void CenterMouse ()
+{
+	SDL_WarpMouse (screen->GetWidth()/2, screen->GetHeight()/2);
+	SDL_PumpEvents ();
+	SDL_GetRelativeMouseState (NULL, NULL);
+}
+
+static void PostMouseMove (int x, int y)
+{
+	static int lastx = 0, lasty = 0;
+	event_t ev = { 0 };
+	
+	if (m_filter)
+	{
+		ev.x = (x + lastx) / 2;
+		ev.y = (y + lasty) / 2;
+	}
+	else
+	{
+		ev.x = x;
+		ev.y = y;
+	}
+	lastx = x;
+	lasty = y;
+	if (ev.x | ev.y)
+	{
+		ev.type = EV_Mouse;
+		D_PostEvent (&ev);
+	}
+}
+
+static void MouseRead ()
+{
+	int x, y;
+
+	if (NativeMouse)
+	{
+		return;
+	}
+
+	SDL_GetRelativeMouseState (&x, &y);
+	if (!m_noprescale)
+	{
+		x *= 3;
+		y *= 2;
+	}
+	if (x | y)
+	{
+		CenterMouse ();
+		PostMouseMove (x, -y);
+	}
+}
 
 static void I_CheckNativeMouse ()
 {
@@ -231,7 +284,7 @@ static void I_CheckNativeMouse ()
 			== (SDL_APPINPUTFOCUS|SDL_APPACTIVE);
 	bool fs = (SDL_GetVideoSurface ()->flags & SDL_FULLSCREEN) != 0;
 	
-	bool wantNative = !focus || (!fs && (GUICapture || paused));
+	bool wantNative = !focus || !use_mouse || (!fs && (GUICapture || paused));
 
 	if (wantNative != NativeMouse)
 	{
@@ -240,12 +293,13 @@ static void I_CheckNativeMouse ()
 		{
 			SDL_ShowCursor (1);
 			SDL_WM_GrabInput (SDL_GRAB_OFF);
-			FlushDIKState (KEY_MOUSE1, KEY_MOUSE4);
+			FlushDIKState (KEY_MOUSE1, KEY_MOUSE4);
 		}
 		else
 		{
 			SDL_ShowCursor (0);
 			SDL_WM_GrabInput (SDL_GRAB_ON);
+			CenterMouse ();
 		}
 	}
 }
@@ -278,30 +332,6 @@ void MessagePump (const SDL_Event &sev)
 		}
 		break;
 
-	case SDL_MOUSEMOTION:
-		x = sev.motion.xrel;
-		y = -sev.motion.yrel;
-		if (!m_noprescale)
-		{
-			x *= 3;
-			y *= 2;
-		}
-		if (m_filter)
-		{
-			event.x = (x + lastx) / 2;
-			event.y = (y + lasty) / 2;
-		}
-		else
-		{
-			event.x = x;
-			event.y = y;
-		}
-		lastx = x;
-		lasty = y;
-		event.type = EV_Mouse;
-		D_PostEvent (&event);
-		break;
-
 	case SDL_MOUSEBUTTONDOWN:
 	case SDL_MOUSEBUTTONUP:
 		event.type = sev.type == SDL_MOUSEBUTTONDOWN ? EV_KeyDown : EV_KeyUp;
@@ -394,9 +424,10 @@ void MessagePump (const SDL_Event &sev)
 			}
 			event.data2 = sev.key.keysym.unicode & 0xff;
 			if (event.data1 < 128)
-			{
+			{
+				event.data1 = toupper(event.data1);
 				D_PostEvent (&event);
-			}
+			}
 			if (!iscntrl(event.data2) && event.subtype != EV_GUI_KeyUp)
 			{
 				event.subtype = EV_GUI_Char;
@@ -416,6 +447,10 @@ void I_GetEvent ()
 	while (SDL_PollEvent (&sev))
 	{
 		MessagePump (sev);
+	}
+	if (use_mouse)
+	{
+		MouseRead ();
 	}
 }
 
diff --git a/src/sdl/i_system.cpp b/src/sdl/i_system.cpp
index 06689fbde..3160d9175 100644
--- a/src/sdl/i_system.cpp
+++ b/src/sdl/i_system.cpp
@@ -416,7 +416,7 @@ int I_FindNext (void *handle, findstate_t *fileinfo)
 int I_FindClose (void *handle)
 {
 	findstate_t *state = (findstate_t *)handle;
-	if (state->count > 0)
+	if (handle != (void*)-1 && state->count > 0)
 	{
 		state->count = 0;
 		free (state->namelist);
diff --git a/src/sdl/sdlvideo.cpp b/src/sdl/sdlvideo.cpp
index 60f27a8ad..c479351ab 100644
--- a/src/sdl/sdlvideo.cpp
+++ b/src/sdl/sdlvideo.cpp
@@ -111,18 +111,41 @@ CUSTOM_CVAR (Float, bgamma, 1.f, CVAR_ARCHIVE|CVAR_GLOBALCONFIG)
 static MiniModeInfo WinModes[] =
 {
 	{ 320, 200 },
-	{ 320, 240 },
-	{ 400, 300 },
-	{ 480, 360 },
-	{ 512, 384 },
+	{ 320, 240 },
+	{ 400, 225 },	// 16:9
+	{ 400, 300 },
+	{ 480, 270 },	// 16:9
+	{ 480, 360 },
+	{ 512, 288 },	// 16:9
+	{ 512, 384 },
+	{ 640, 360 },	// 16:9
 	{ 640, 400 },
-	{ 640, 480 },
-	{ 720, 540 },
-	{ 800, 600 },
-	{ 960, 720 },
-	{ 1024, 768 },
-	{ 1152, 864 },
-	{ 1280, 960 }
+	{ 640, 480 },
+	{ 720, 480 },	// 16:10
+	{ 720, 540 },
+	{ 800, 450 },	// 16:9
+	{ 800, 500 },	// 16:10
+	{ 800, 600 },
+	{ 848, 480 },	// 16:9
+	{ 960, 600 },	// 16:10
+	{ 960, 720 },
+	{ 1024, 576 },	// 16:9
+	{ 1024, 640 },	// 16:10
+	{ 1024, 768 },
+	{ 1088, 612 },	// 16:9
+	{ 1152, 648 },	// 16:9
+	{ 1152, 720 },	// 16:10
+	{ 1152, 864 },
+	{ 1280, 720 },	// 16:9
+	{ 1280, 800 },	// 16:10
+	{ 1280, 960 },
+	{ 1360, 768 },	// 16:9
+	{ 1400, 787 },	// 16:9
+	{ 1400, 875 },	// 16:10
+	{ 1400, 1050 },
+	{ 1600, 900 },	// 16:9
+	{ 1600, 1000 },	// 16:10
+	{ 1600, 1200 },
 };
 
 static cycle_t BlitCycles;