diff --git a/include/QF/msg.h b/include/QF/msg.h
index d10d435ae..cf0aa8505 100644
--- a/include/QF/msg.h
+++ b/include/QF/msg.h
@@ -41,7 +41,7 @@ void MSG_WriteLong (sizebuf_t *sb, int c);
 void MSG_WriteLongBE (sizebuf_t *sb, int c);
 void MSG_WriteFloat (sizebuf_t *sb, float f);
 void MSG_WriteString (sizebuf_t *sb, const char *s);
-void MSG_WriteBytes (sizebuf_t *sb, const void *buf, int len);
+void MSG_WriteBytes (sizebuf_t *sb, const void *buf, unsigned len);
 void MSG_WriteCoord (sizebuf_t *sb, float coord);
 void MSG_WriteCoordV (sizebuf_t *sb, const vec3_t coord);
 void MSG_WriteCoordAngleV (sizebuf_t *sb, const vec3_t coord,
@@ -53,11 +53,11 @@ void MSG_WriteAngle16V (sizebuf_t *sb, const vec3_t angle);
 void MSG_WriteUTF8 (sizebuf_t *sb, unsigned utf8);
 
 typedef struct msg_s {
-	int readcount;
-	qboolean badread;		// set if a read goes beyond end of message
-	sizebuf_t *message;
-	size_t badread_string_size;
-	char *badread_string;
+	unsigned    readcount;
+	qboolean    badread;		// set if a read goes beyond end of message
+	sizebuf_t  *message;
+	size_t      badread_string_size;
+	char       *badread_string;
 } qmsg_t;
 
 /** Reset the message read status.
@@ -75,7 +75,7 @@ void MSG_BeginReading (qmsg_t *msg);
 	\param msg		The message to check.
 	\return			The number of bytes that have been read.
 */
-int MSG_GetReadCount(qmsg_t *msg) __attribute__((pure));
+unsigned MSG_GetReadCount(qmsg_t *msg) __attribute__((pure));
 
 /** Read a single byte from the message.
 
@@ -175,7 +175,7 @@ const char *MSG_ReadString (qmsg_t *msg);
 	\param len		The number of bytes to read.
 	\return			The number of bytes read from the message.
 */
-int MSG_ReadBytes (qmsg_t *msg, void *buf, int len);
+int MSG_ReadBytes (qmsg_t *msg, void *buf, unsigned len);
 
 /** Read a little-endian 16-bit fixed point (13.3) coordinate value from the
 	message.
diff --git a/include/QF/sizebuf.h b/include/QF/sizebuf.h
index 5e0e9a93c..c454cdc4c 100644
--- a/include/QF/sizebuf.h
+++ b/include/QF/sizebuf.h
@@ -37,18 +37,18 @@
 
 typedef struct sizebuf_s
 {
-	qboolean	allowoverflow;	// if false, do a Sys_Error
-	qboolean	overflowed;		// set to true if the buffer size failed
-	byte	*data;
-	int		maxsize;
-	int		cursize;
+	qboolean    allowoverflow;	// if false, do a Sys_Error
+	qboolean    overflowed;		// set to true if the buffer size failed
+	byte       *data;
+	unsigned    maxsize;
+	unsigned    cursize;
 } sizebuf_t;
 
-void SZ_Alloc (sizebuf_t *buf, int maxsize);
+void SZ_Alloc (sizebuf_t *buf, unsigned maxsize);
 void SZ_Free (sizebuf_t *buf);
 void SZ_Clear (sizebuf_t *buf);
-void *SZ_GetSpace (sizebuf_t *buf, int length);
-void SZ_Write (sizebuf_t *buf, const void *data, int length);
+void *SZ_GetSpace (sizebuf_t *buf, unsigned length);
+void SZ_Write (sizebuf_t *buf, const void *data, unsigned length);
 void SZ_Print (sizebuf_t *buf, const char *data);	// strcats onto the sizebuf
 void SZ_Dump (sizebuf_t *buf);
 
diff --git a/include/netchan.h b/include/netchan.h
index 6197cc8db..d502f1030 100644
--- a/include/netchan.h
+++ b/include/netchan.h
@@ -317,7 +317,7 @@ void Netchan_Init_Cvars (void);
 	\param length	The size of the unreliable packet.
 	\param data		The data of the unreliable packet.
 */
-void Netchan_Transmit (netchan_t *chan, int length, byte *data);
+void Netchan_Transmit (netchan_t *chan, unsigned length, byte *data);
 
 /** Send an out-of-band packet.
 
@@ -325,7 +325,7 @@ void Netchan_Transmit (netchan_t *chan, int length, byte *data);
 	\param length	The length of the data to be sent.
 	\param data		The data to be sent.
 */
-void Netchan_OutOfBand (netadr_t adr, int length, byte *data);
+void Netchan_OutOfBand (netadr_t adr, unsigned length, byte *data);
 /** Send a formatted string as an out-of-band packet.
 
 	\param adr		The address to which the data will be sent.
diff --git a/include/qw/msg_backbuf.h b/include/qw/msg_backbuf.h
index 12cbb0b06..0a6cea2db 100644
--- a/include/qw/msg_backbuf.h
+++ b/include/qw/msg_backbuf.h
@@ -43,10 +43,10 @@ typedef struct backbuf_s {
 	const char *name;
 } backbuf_t;
 
-int MSG_ReliableCheckSize (backbuf_t *rel, int maxsize, int minsize) __attribute__((pure));
-sizebuf_t *MSG_ReliableCheckBlock(backbuf_t *rel, int maxsize);
+int MSG_ReliableCheckSize (backbuf_t *rel, unsigned maxsize, unsigned minsize) __attribute__((pure));
+sizebuf_t *MSG_ReliableCheckBlock(backbuf_t *rel, unsigned maxsize);
 void MSG_Reliable_FinishWrite(backbuf_t *rel);
-sizebuf_t *MSG_ReliableWrite_Begin(backbuf_t *rel, int c, int maxsize);
+sizebuf_t *MSG_ReliableWrite_Begin(backbuf_t *rel, int c, unsigned maxsize);
 void MSG_ReliableWrite_Angle(backbuf_t *rel, float f);
 void MSG_ReliableWrite_Angle16(backbuf_t *rel, float f);
 void MSG_ReliableWrite_Byte(backbuf_t *rel, int c);
@@ -56,7 +56,7 @@ void MSG_ReliableWrite_Coord(backbuf_t *rel, float f);
 void MSG_ReliableWrite_Long(backbuf_t *rel, int c);
 void MSG_ReliableWrite_Short(backbuf_t *rel, int c);
 void MSG_ReliableWrite_String(backbuf_t *rel, const char *s);
-void MSG_ReliableWrite_SZ(backbuf_t *rel, const void *data, int len);
+void MSG_ReliableWrite_SZ(backbuf_t *rel, const void *data, unsigned len);
 void MSG_ReliableWrite_AngleV(backbuf_t *rel, const vec3_t v);
 void MSG_ReliableWrite_CoordV(backbuf_t *rel, const vec3_t v);
 void MSG_Reliable_Send (backbuf_t *rel);
diff --git a/libs/net/net_chan.c b/libs/net/net_chan.c
index 61f125117..53557a95c 100644
--- a/libs/net/net_chan.c
+++ b/libs/net/net_chan.c
@@ -92,7 +92,7 @@ Netchan_Init_Cvars (void)
 	Sends an out-of-band datagram
 */
 void
-Netchan_OutOfBand (netadr_t adr, int length, byte * data)
+Netchan_OutOfBand (netadr_t adr, unsigned length, byte * data)
 {
 	byte        send_buf[MAX_MSGLEN + PACKET_HEADER];
 	sizebuf_t   send;
@@ -185,7 +185,7 @@ Netchan_CanReliable (netchan_t *chan)
 }
 
 void
-Netchan_Transmit (netchan_t *chan, int length, byte *data)
+Netchan_Transmit (netchan_t *chan, unsigned length, byte *data)
 {
 	byte        send_buf[MAX_MSGLEN + PACKET_HEADER];
 	int         i;
diff --git a/libs/qw/msg_backbuf.c b/libs/qw/msg_backbuf.c
index 90d80704c..3a87cedc5 100644
--- a/libs/qw/msg_backbuf.c
+++ b/libs/qw/msg_backbuf.c
@@ -59,7 +59,7 @@ PushBackbuf (backbuf_t *rel)
 }
 
 int
-MSG_ReliableCheckSize (backbuf_t *rel, int maxsize, int minsize)
+MSG_ReliableCheckSize (backbuf_t *rel, unsigned maxsize, unsigned minsize)
 {
 	sizebuf_t  *msg = &rel->netchan->message;
 
@@ -80,7 +80,7 @@ MSG_ReliableCheckSize (backbuf_t *rel, int maxsize, int minsize)
 
 // check to see if client block will fit, if not, rotate buffers
 sizebuf_t *
-MSG_ReliableCheckBlock (backbuf_t *rel, int maxsize)
+MSG_ReliableCheckBlock (backbuf_t *rel, unsigned maxsize)
 {
 	sizebuf_t  *msg = &rel->netchan->message;
 
@@ -108,7 +108,7 @@ MSG_ReliableCheckBlock (backbuf_t *rel, int maxsize)
 
 // begin a client block, estimated maximum size
 sizebuf_t *
-MSG_ReliableWrite_Begin (backbuf_t *rel, int c, int maxsize)
+MSG_ReliableWrite_Begin (backbuf_t *rel, int c, unsigned maxsize)
 {
 	sizebuf_t  *msg;
 	msg = MSG_ReliableCheckBlock (rel, maxsize);
@@ -226,7 +226,7 @@ MSG_ReliableWrite_String (backbuf_t *rel, const char *s)
 }
 
 void
-MSG_ReliableWrite_SZ (backbuf_t *rel, const void *data, int len)
+MSG_ReliableWrite_SZ (backbuf_t *rel, const void *data, unsigned len)
 {
 	if (rel->num_backbuf) {
 		SZ_Write (&rel->backbuf, data, len);
diff --git a/libs/util/msg.c b/libs/util/msg.c
index 92596dcc6..0908dff2b 100644
--- a/libs/util/msg.c
+++ b/libs/util/msg.c
@@ -126,7 +126,7 @@ MSG_WriteString (sizebuf_t *sb, const char *s)
 }
 
 VISIBLE void
-MSG_WriteBytes (sizebuf_t *sb, const void *buf, int len)
+MSG_WriteBytes (sizebuf_t *sb, const void *buf, unsigned len)
 {
 	SZ_Write (sb, buf, len);
 }
@@ -253,7 +253,7 @@ MSG_BeginReading (qmsg_t *msg)
 	msg->badread = false;
 }
 
-VISIBLE int
+VISIBLE unsigned
 MSG_GetReadCount (qmsg_t *msg)
 {
 	return msg->readcount;
@@ -403,7 +403,7 @@ MSG_ReadString (qmsg_t *msg)
 }
 
 VISIBLE int
-MSG_ReadBytes (qmsg_t *msg, void *buf, int len)
+MSG_ReadBytes (qmsg_t *msg, void *buf, unsigned len)
 {
 	if (msg->badread || len > msg->message->cursize - msg->readcount) {
 		msg->badread = true;
@@ -474,7 +474,8 @@ VISIBLE int
 MSG_ReadUTF8 (qmsg_t *msg)
 {
 	byte       *buf, *start, c;
-	int         val = 0, count;
+	int         val = 0;
+	unsigned    count;
 
 	if (msg->badread || msg->message->cursize == msg->readcount) {
 		msg->badread = true;
diff --git a/libs/util/sizebuf.c b/libs/util/sizebuf.c
index f7d433110..25f835a4f 100644
--- a/libs/util/sizebuf.c
+++ b/libs/util/sizebuf.c
@@ -41,7 +41,7 @@
 
 
 VISIBLE void
-SZ_Alloc (sizebuf_t *buf, int maxsize)
+SZ_Alloc (sizebuf_t *buf, unsigned maxsize)
 {
 	if (maxsize < 256)
 		maxsize = 256;
@@ -58,7 +58,7 @@ SZ_Clear (sizebuf_t *buf)
 }
 
 VISIBLE void *
-SZ_GetSpace (sizebuf_t *buf, int length)
+SZ_GetSpace (sizebuf_t *buf, unsigned length)
 {
 	void       *data;
 
@@ -83,7 +83,7 @@ getspace:
 }
 
 VISIBLE void
-SZ_Write (sizebuf_t *buf, const void *data, int length)
+SZ_Write (sizebuf_t *buf, const void *data, unsigned length)
 {
 	memcpy (SZ_GetSpace (buf, length), data, length);
 }
@@ -91,7 +91,7 @@ SZ_Write (sizebuf_t *buf, const void *data, int length)
 VISIBLE void
 SZ_Print (sizebuf_t *buf, const char *data)
 {
-	int         len;
+	unsigned    len;
 
 	len = strlen (data) + 1;
 	if (buf->cursize && !buf->data[buf->cursize - 1])
@@ -103,7 +103,7 @@ SZ_Print (sizebuf_t *buf, const char *data)
 VISIBLE void
 SZ_Dump (sizebuf_t *buf)
 {
-	int         i;
+	unsigned    i;
 	char        chars[17], c;
 
 	chars[16] = 0;
diff --git a/nq/source/cl_demo.c b/nq/source/cl_demo.c
index 0d7e91a51..a119cb8b6 100644
--- a/nq/source/cl_demo.c
+++ b/nq/source/cl_demo.c
@@ -174,7 +174,8 @@ check_next_demopacket (void)
 static int
 read_demopacket (void)
 {
-	int         i, r;
+	int         i;
+	unsigned    r;
 	float       f;
 
 	Qread (cls.demofile, &net_message->message->cursize, 4);
diff --git a/qtv/source/server.c b/qtv/source/server.c
index 00778acea..28f43ad6f 100644
--- a/qtv/source/server.c
+++ b/qtv/source/server.c
@@ -124,7 +124,7 @@ server_compare (const void *a, const void *b)
 }
 
 static void
-setup_sub_message (qmsg_t *msg, qmsg_t *sub, sizebuf_t *buf, int len)
+setup_sub_message (qmsg_t *msg, qmsg_t *sub, sizebuf_t *buf, unsigned len)
 {
 	memset (sub, 0, sizeof (qmsg_t));
 	memset (buf, 0, sizeof (sizebuf_t));
@@ -274,7 +274,7 @@ server_handler (connection_t *con, void *object)
 	if (!Netchan_Process (&sv->netchan))
 		return;
 	if (0) {
-		int         i;
+		unsigned    i;
 
 		for (i = 0; i < net_message->message->cursize; i++)
 			qtv_printf ("%c%02x", (i % 16) ? ' ' : '\n',
diff --git a/qw/include/sv_recorder.h b/qw/include/sv_recorder.h
index f8be8b97f..a2875360a 100644
--- a/qw/include/sv_recorder.h
+++ b/qw/include/sv_recorder.h
@@ -41,7 +41,7 @@ recorder_t *SVR_AddUser (void (*writer)(void *, struct sizebuf_s *, int),
 						 void (*finish)(void *, struct sizebuf_s *),
 						 int demo, void *user);
 void SVR_RemoveUser (recorder_t *r);
-struct sizebuf_s *SVR_WriteBegin (byte type, int to, int size);
+struct sizebuf_s *SVR_WriteBegin (byte type, int to, unsigned size);
 struct sizebuf_s *SVR_Datagram (void) __attribute__((const));
 void SVR_ForceFrame (void);
 void SVR_Pause (recorder_t *r);
diff --git a/qw/source/cl_demo.c b/qw/source/cl_demo.c
index 51789e572..dd4114e14 100644
--- a/qw/source/cl_demo.c
+++ b/qw/source/cl_demo.c
@@ -271,7 +271,7 @@ check_next_demopacket (void)
 static int
 read_demopacket (void)
 {
-	int         r;
+	unsigned    r;
 
 	Qread (cls.demofile, &net_message->message->cursize, 4);
 	net_message->message->cursize =
diff --git a/qw/source/cl_main.c b/qw/source/cl_main.c
index 09ef477c4..e2deb673b 100644
--- a/qw/source/cl_main.c
+++ b/qw/source/cl_main.c
@@ -1013,8 +1013,10 @@ CL_ReadPackets (void)
 {
 	while (CL_GetMessage ()) {
 
-		if (net_message->message->cursize == -1)
+		// non-packet set up by the demo reader
+		if ((int) net_message->message->cursize == -1) {
 			continue;
+		}
 
 		if (cls.demoplayback && net_packetlog->int_val)
 			Log_Incoming_Packet (net_message->message->data,
diff --git a/qw/source/sv_recorder.c b/qw/source/sv_recorder.c
index d2555862e..cd5cdf1c2 100644
--- a/qw/source/sv_recorder.c
+++ b/qw/source/sv_recorder.c
@@ -56,8 +56,8 @@
 
 typedef struct dbuffer_s {
 	byte       *data;
-	int         start, end, last;
-	int         maxsize;
+	unsigned    start, end, last;
+	unsigned    maxsize;
 } dbuffer_t;
 
 typedef struct header_s {
@@ -70,7 +70,7 @@ typedef struct header_s {
 
 typedef struct demobuf_s {
 	sizebuf_t   sz;
-	int         bufsize;
+	unsigned    bufsize;
 	header_t   *h;
 } demobuf_t;
 
@@ -200,9 +200,9 @@ write_msg (sizebuf_t *msg, int type, int to, float time, sizebuf_t *dst)
 static void
 write_to_msg (int type, int to, float time, sizebuf_t *dst)
 {
-	int         pos = 0;
+	unsigned    pos = 0;
 	header_t   *p;
-	int         size;
+	unsigned    size;
 	sizebuf_t   msg;
 
 	p = (header_t *) rec.dbuf->sz.data;
@@ -256,7 +256,7 @@ static void
 set_buf (byte type, int to)
 {
 	header_t   *p;
-	int         pos = 0;
+	unsigned    pos = 0;
 
 	p = (header_t *) rec.dbuf->sz.data;
 
@@ -464,7 +464,7 @@ write_packet (void)
 }
 
 sizebuf_t *
-SVR_WriteBegin (byte type, int to, int size)
+SVR_WriteBegin (byte type, int to, unsigned size)
 {
 	byte       *p;
 	qboolean    move = false;