diff --git a/docs/rh-log.txt b/docs/rh-log.txt
index f778dc3e4f..ed76662309 100644
--- a/docs/rh-log.txt
+++ b/docs/rh-log.txt
@@ -1,3 +1,8 @@
+December 18, 2009
+- A_FreezeDeath() now removes fuzz effects.
+- In mus2midi.cpp, added range checking to MUS_SYSEVENT and MUS_CTRLCHANGE,
+  and masking for note-off keys, note-on velocities, and program changes.
+
 December 18, 2009  (Changes by Graf Zahl)
 - added all known maps requiring inverted sprite sorting to compatibility.txt.
 - added compatibility option to invert sprite sorting. Apparently Doom.exe
diff --git a/src/g_shared/a_action.cpp b/src/g_shared/a_action.cpp
index 5dcdd0c283..571b7bf1f8 100644
--- a/src/g_shared/a_action.cpp
+++ b/src/g_shared/a_action.cpp
@@ -163,6 +163,12 @@ DEFINE_ACTION_FUNCTION(AActor, A_FreezeDeath)
 	self->flags2 |= MF2_PUSHABLE|MF2_TELESTOMP|MF2_PASSMOBJ|MF2_SLIDE;
 	self->flags3 |= MF3_CRASHED;
 	self->height = self->GetDefault()->height;
+	// Remove fuzz effects from frozen actors.
+	if (self->RenderStyle.BlendOp >= STYLEOP_Fuzz && self->RenderStyle.BlendOp <= STYLEOP_FuzzOrRevSub)
+	{
+		self->RenderStyle = STYLE_Normal;
+	}
+
 	S_Sound (self, CHAN_BODY, "misc/freeze", 1, ATTN_NORM);
 
 	// [RH] Andy Baker's stealth monsters
@@ -178,7 +184,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_FreezeDeath)
 		self->player->poisoncount = 0;
 		self->player->bonuscount = 0;
 	}
-	else if (self->flags3&MF3_ISMONSTER && self->special)
+	else if (self->flags3 & MF3_ISMONSTER && self->special)
 	{ // Initiate monster death actions
 		LineSpecials [self->special] (NULL, self, false, self->args[0],
 			self->args[1], self->args[2], self->args[3], self->args[4]);
diff --git a/src/mus2midi.cpp b/src/mus2midi.cpp
index 9dafcaabf1..beef4ffa42 100644
--- a/src/mus2midi.cpp
+++ b/src/mus2midi.cpp
@@ -121,7 +121,8 @@ bool ProduceMIDI (const BYTE *musBuf, TArray<BYTE> &outFile)
 	BYTE chanUsed[16];
 	BYTE lastVel[16];
 	long trackLen;
-	
+	bool no_op;
+
 	// Do some validation of the MUS file
 	if (MUSMagic != musHead->Magic)
 		return false;
@@ -178,12 +179,13 @@ bool ProduceMIDI (const BYTE *musBuf, TArray<BYTE> &outFile)
 		
 		midStatus = channel;
 		midArgs = 0;		// Most events have two args (0 means 2, 1 means 1)
-		
+		no_op = false;
+
 		switch (event & 0x70)
 		{
 		case MUS_NOTEOFF:
 			midStatus |= MIDI_NOTEOFF;
-			mid1 = t;
+			mid1 = t & 127;
 			mid2 = 64;
 			break;
 			
@@ -192,7 +194,7 @@ bool ProduceMIDI (const BYTE *musBuf, TArray<BYTE> &outFile)
 			mid1 = t & 127;
 			if (t & 128)
 			{
-				lastVel[channel] = musBuf[mus_p++];;
+				lastVel[channel] = musBuf[mus_p++] & 127;
 			}
 			mid2 = lastVel[channel];
 			break;
@@ -204,9 +206,16 @@ bool ProduceMIDI (const BYTE *musBuf, TArray<BYTE> &outFile)
 			break;
 			
 		case MUS_SYSEVENT:
-			midStatus |= MIDI_CTRLCHANGE;
-			mid1 = CtrlTranslate[t];
-			mid2 = t == 12 ? LittleShort(musHead->NumChans) : 0;
+			if (t < 10 || t > 14)
+			{
+				no_op = true;
+			}
+			else
+			{
+				midStatus |= MIDI_CTRLCHANGE;
+				mid1 = CtrlTranslate[t];
+				mid2 = t == 12 /* Mono */ ? LittleShort(musHead->NumChans) : 0;
+			}
 			break;
 			
 		case MUS_CTRLCHANGE:
@@ -214,27 +223,39 @@ bool ProduceMIDI (const BYTE *musBuf, TArray<BYTE> &outFile)
 			{ // program change
 				midArgs = 1;
 				midStatus |= MIDI_PRGMCHANGE;
-				mid1 = musBuf[mus_p++];
+				mid1 = musBuf[mus_p++] & 127;
 				mid2 = 0;	// Assign mid2 just to make GCC happy
 			}
-			else
+			else if (t > 0 && t < 10)
 			{
 				midStatus |= MIDI_CTRLCHANGE;
 				mid1 = CtrlTranslate[t];
 				mid2 = musBuf[mus_p++];
 			}
+			else
+			{
+				no_op = true;
+			}
 			break;
 			
 		case MUS_SCOREEND:
-			midStatus = 0xff;
-			mid1 = 0x2f;
-			mid2 = 0x00;
+			midStatus = MIDI_META;
+			mid1 = MIDI_META_EOT;
+			mid2 = 0;
 			break;
 			
 		default:
 			return false;
 		}
 
+		if (no_op)
+		{
+			// A system-specific event with no data is a no-op.
+			midStatus = MIDI_META;
+			mid1 = MIDI_META_SSPEC;
+			mid2 = 0;
+		}
+
 		WriteVarLen (outFile, deltaTime);
 
 		if (midStatus != status)
diff --git a/src/mus2midi.h b/src/mus2midi.h
index 79b4100788..6780bdf47c 100644
--- a/src/mus2midi.h
+++ b/src/mus2midi.h
@@ -46,6 +46,7 @@
 #define MIDI_META		((BYTE)0xFF)		 // Meta event begin
 #define MIDI_META_TEMPO ((BYTE)0x51)
 #define MIDI_META_EOT	((BYTE)0x2F)		 // End-of-track
+#define MIDI_META_SSPEC	((BYTE)0x7F)		 // System-specific event
 
 #define MIDI_NOTEOFF	((BYTE)0x80)		 // + note + velocity
 #define MIDI_NOTEON 	((BYTE)0x90)		 // + note + velocity