diff --git a/engine/client/cl_main.c b/engine/client/cl_main.c
index 469d1953d..122e2beb1 100644
--- a/engine/client/cl_main.c
+++ b/engine/client/cl_main.c
@@ -3063,7 +3063,6 @@ void Host_Frame (double time)
 		}
 	}
 
-	TP_CheckVars();
 	RSpeedEnd(RSPEED_PROTOCOL);
 
 	// update video
diff --git a/engine/client/cl_screen.c b/engine/client/cl_screen.c
index a315a0412..3214c0d1f 100644
--- a/engine/client/cl_screen.c
+++ b/engine/client/cl_screen.c
@@ -292,7 +292,9 @@ void SCR_StringToRGB (char *rgbstring, float *rgb, float rgbinputscale)
 		int i = atoi(rgbstring);
 		i = bound(0, i, 255);
 
-		pal = host_basepal + (i * 3);
+		pal = host_basepal;
+
+		pal += (i * 3);
 		// convert r8g8b8 to rgb floats
 		rgb[0] = (float)(pal[0]);
 		rgb[1] = (float)(pal[1]);
diff --git a/engine/client/client.h b/engine/client/client.h
index fa110223e..a15e4db61 100644
--- a/engine/client/client.h
+++ b/engine/client/client.h
@@ -922,7 +922,6 @@ void TP_ExecTrigger (char *s);
 qboolean TP_SuppressMessage(char *buf);
 
 void TP_Init(void);
-void TP_CheckVars(void);
 void TP_CheckPickupSound(char *s, vec3_t org);
 void TP_ParsePlayerInfo(player_state_t *oldstate, player_state_t *state, player_info_t *info);
 void CL_Say (qboolean team, char *extra);
diff --git a/engine/client/keys.c b/engine/client/keys.c
index 7ad96379a..8a2f4c906 100644
--- a/engine/client/keys.c
+++ b/engine/client/keys.c
@@ -54,8 +54,10 @@ qboolean	keydown[K_MAX];
 
 qboolean deltaused[K_MAX][KEY_MODIFIERSTATES];
 
+void Con_Selectioncolour_Callback(struct cvar_s *var, char *oldvalue);
+
 extern cvar_t con_displaypossabilities;
-cvar_t con_selectioncolour = SCVAR("con_selectioncolour", "0");
+cvar_t con_selectioncolour = SCVARFC("con_selectioncolour", "0", CVAR_RENDERERCALLBACK, Con_Selectioncolour_Callback);
 extern cvar_t cl_chatmode;
 
 static int KeyModifier (qboolean shift, qboolean alt, qboolean ctrl)
@@ -385,9 +387,14 @@ void Con_ExecuteLine(console_t *con, char *line)
 									// may take some time
 }
 
-int scmodified;
 vec3_t sccolor;
 
+void Con_Selectioncolour_Callback(struct cvar_s *var, char *oldvalue)
+{
+	if (qrenderer != QR_NONE && qrenderer != -1)
+		SCR_StringToRGB(var->string, sccolor, 1);
+}
+
 void Key_ConsoleDrawSelectionBox(void)
 {
 		extern cvar_t vid_conwidth, vid_conheight;
@@ -427,9 +434,6 @@ void Key_ConsoleDrawSelectionBox(void)
 		}
 		ypos++;
 
-	if (scmodified != con_selectioncolour.modified)
-		SCR_StringToRGB(con_selectioncolour.string, sccolor, 1);
-
 	Draw_FillRGB(xpos2*8, ypos2*8, (xpos - xpos2)*8, (ypos - ypos2)*8, sccolor[0], sccolor[1], sccolor[2]);
 }
 
diff --git a/engine/client/renderer.c b/engine/client/renderer.c
index d3fae6896..75c9be0ea 100644
--- a/engine/client/renderer.c
+++ b/engine/client/renderer.c
@@ -1953,6 +1953,8 @@ TRACE(("dbg: R_RestartRenderer_f\n"));
 			}
 		}
 	}
+
+	Cvar_ApplyCallbacks(CVAR_RENDERERCALLBACK);
 	SCR_EndLoadingPlaque();
 
 	TRACE(("dbg: R_RestartRenderer_f success\n"));
diff --git a/engine/client/zqtp.c b/engine/client/zqtp.c
index 34a96b595..f184d9260 100644
--- a/engine/client/zqtp.c
+++ b/engine/client/zqtp.c
@@ -92,6 +92,9 @@ static size_t strlcat (char *dst, const char *src, size_t size)
 }
 #endif
 
+// callbacks used for TP cvars
+void TP_SkinCvar_Callback(struct cvar_s *var, char *oldvalue);
+
 //a list of all the cvars
 //this is down to the fact that I keep defining them but forgetting to register. :/
 #define TP_CVARS \
@@ -101,8 +104,8 @@ static size_t strlcat (char *dst, const char *src, size_t size)
 	TP_CVAR(cl_triggers,		"1");	\
 	TP_CVAR(tp_forceTriggers,		"0");	\
 	TP_CVAR(tp_loadlocs,		"1");	\
-	TP_CVAR(cl_teamskin,		"");	\
-	TP_CVAR(cl_enemyskin,		"");	\
+	TP_CVARC(cl_teamskin,		"", TP_SkinCvar_Callback);	\
+	TP_CVARC(cl_enemyskin,		"", TP_SkinCvar_Callback);	\
 	TP_CVAR(tp_soundtrigger,		"~");	\
 										\
 	TP_CVAR(tp_name_none,		"");	\
@@ -186,9 +189,10 @@ static size_t strlcat (char *dst, const char *src, size_t size)
 
 //create the globals for all the TP cvars.
 #define TP_CVAR(name,def) cvar_t	name = SCVAR(#name, def)
+#define TP_CVARC(name,def,call) cvar_t name = SCVARC(#name, def, call)
 TP_CVARS;
 #undef TP_CVAR
-
+#undef TP_CVARC
 
 extern cvar_t	host_mapname;
 
@@ -3114,14 +3118,9 @@ static void TP_MsgFilter_f (void)
 	}
 }
 
-void TP_CheckVars(void)
+void TP_SkinCvar_Callback(struct cvar_s *var, char *oldvalue)
 {
-	if (cl_enemyskin.modified || cl_teamskin.modified)
-	{
-		Skin_FlushPlayers();
-		cl_enemyskin.modified = false;
-		cl_teamskin.modified = false;
-	}
+	Skin_FlushPlayers();
 }
 
 void TP_Init (void)
@@ -3130,8 +3129,10 @@ void TP_Init (void)
 
 	//register all the TeamPlay cvars.
 #define TP_CVAR(name,def) Cvar_Register (&name,	TEAMPLAYVARS);
+#define TP_CVARC(name,def,callback) Cvar_Register (&name, TEAMPLAYVARS);
 	TP_CVARS;
 #undef TP_CVAR
+#undef TP_CVARC
 
 	Cmd_AddCommand ("loadloc", TP_LoadLocFile_f);
 	Cmd_AddCommand ("filter", TP_MsgFilter_f);
diff --git a/engine/common/cvar.c b/engine/common/cvar.c
index e5744c9e5..60086e861 100644
--- a/engine/common/cvar.c
+++ b/engine/common/cvar.c
@@ -157,6 +157,8 @@ char *Cvar_FlagToName(int flag)
 		return "renderlatch";
 	case CVAR_SERVEROVERRIDE:
 		return "serverlatch";
+	case CVAR_RENDERERCALLBACK:
+		return "rendercallback";
 	}
 
 	return NULL;
@@ -761,6 +763,22 @@ void Cvar_ForceCheatVars(qboolean semicheats, qboolean absolutecheats)
 	}
 }
 
+void Cvar_ApplyCallbacks(int callbackflag)
+{
+	cvar_group_t	*grp;
+	cvar_t	*var;
+
+	for (grp=cvar_groups ; grp ; grp=grp->next)
+	for (var=grp->cvars ; var ; var=var->next)
+	{
+		if (var->flags & callbackflag)
+		{
+			if (var->callback)
+				var->callback(var, var->string);
+		}
+	}
+}
+
 void Cvar_ApplyLatches(int latchflag)
 {
 	cvar_group_t	*grp;
diff --git a/engine/common/cvar.h b/engine/common/cvar.h
index b5524a6e6..fc307381b 100644
--- a/engine/common/cvar.h
+++ b/engine/common/cvar.h
@@ -75,6 +75,7 @@ typedef struct cvar_s
 
 #define FCVARC(ConsoleName,ConsoleName2,Value,Flags,Callback) {ConsoleName, Value, NULL, Flags, 0, 0, 0, ConsoleName2, Callback}
 #define FCVAR(ConsoleName,ConsoleName2,Value,Flags) FCVARC(ConsoleName, ConsoleName2, Value, Flags, NULL)
+#define SCVARFC(ConsoleName, Value, Flags, Callback) FCVARC(ConsoleName, NULL, Value, Flags, Callback)
 #define SCVARF(ConsoleName,Value, Flags) FCVAR(ConsoleName, NULL, Value, Flags)
 #define SCVARC(ConsoleName,Value,Callback) FCVARC(ConsoleName, NULL, Value, 0, Callback)
 #define SCVAR(ConsoleName,Value) FCVAR(ConsoleName, NULL, Value, 0)
@@ -96,15 +97,16 @@ typedef struct cvar_group_s
 #define	CVAR_LATCH			16	// save changes until server restart
 
 //freestyle
-#define CVAR_POINTER		32	// q2 style. May be converted to q1 if needed. These are often specified on the command line and then converted into q1 when registered properly.
-#define CVAR_NOTFROMSERVER	64	// the console will ignore changes to cvars if set at from the server or any gamecode. This is to protect against security flaws - like qterm
-#define CVAR_USERCREATED	128	//write a 'set' or 'seta' in front of the var name.
-#define CVAR_CHEAT			256	//latch to the default, unless cheats are enabled.
-#define CVAR_SEMICHEAT		512	//if strict ruleset, force to 0/blank.
-#define CVAR_RENDERERLATCH	1024	//requires a vid_restart to reapply.
-#define CVAR_SERVEROVERRIDE 2048	//the server has overridden out local value - should probably be called SERVERLATCH
+#define CVAR_POINTER			32	// q2 style. May be converted to q1 if needed. These are often specified on the command line and then converted into q1 when registered properly.
+#define CVAR_NOTFROMSERVER		64	// the console will ignore changes to cvars if set at from the server or any gamecode. This is to protect against security flaws - like qterm
+#define CVAR_USERCREATED		128	//write a 'set' or 'seta' in front of the var name.
+#define CVAR_CHEAT				256	//latch to the default, unless cheats are enabled.
+#define CVAR_SEMICHEAT			512	//if strict ruleset, force to 0/blank.
+#define CVAR_RENDERERLATCH		1024	//requires a vid_restart to reapply.
+#define CVAR_SERVEROVERRIDE		2048	//the server has overridden out local value - should probably be called SERVERLATCH
+#define CVAR_RENDERERCALLBACK	4096 //force callback for cvars on renderer change
 
-#define CVAR_LASTFLAG CVAR_SERVEROVERRIDE
+#define CVAR_LASTFLAG CVAR_RENDERERCALLBACK
 
 #define CVAR_LATCHMASK		(CVAR_LATCH|CVAR_RENDERERLATCH|CVAR_SERVEROVERRIDE|CVAR_CHEAT|CVAR_SEMICHEAT)	//you're only allowed one of these.
 #define CVAR_NEEDDEFAULT	CVAR_CHEAT
@@ -129,6 +131,9 @@ void	Cvar_SetValue (cvar_t *var, float value);
 void Cvar_ApplyLatches(int latchflag);
 //sets vars to thier latched values
 
+void Cvar_ApplyCallbacks(int callbackflag);
+//forces callbacks to be ran for given flags
+
 float	Cvar_VariableValue (const char *var_name);
 // returns 0 if not defined or non numeric
 
diff --git a/engine/common/log.c b/engine/common/log.c
index d060c4f32..8f154b96c 100644
--- a/engine/common/log.c
+++ b/engine/common/log.c
@@ -2,10 +2,14 @@
 
 #include "quakedef.h"
 
+// cvar callbacks
+void Log_Dir_Callback (struct cvar_s *var, char *oldvalue);
+void Log_Name_Callback (struct cvar_s *var, char *oldvalue);
+
 // cvars
 #define CONLOGGROUP "Console logging"
-cvar_t		log_name = SCVARF("log_name", "", CVAR_NOTFROMSERVER);
-cvar_t		log_dir = SCVARF("log_dir", "", CVAR_NOTFROMSERVER);
+cvar_t		log_name = SCVARFC("log_name", "", CVAR_NOTFROMSERVER, Log_Name_Callback);
+cvar_t		log_dir = SCVARFC("log_dir", "", CVAR_NOTFROMSERVER, Log_Dir_Callback);
 cvar_t		log_readable = SCVARF("log_readable", "0", CVAR_NOTFROMSERVER);
 cvar_t		log_enable = SCVARF("log_enable", "0", CVAR_NOTFROMSERVER);
 cvar_t		log_developer = SCVARF("log_developer", "0", CVAR_NOTFROMSERVER);
@@ -54,6 +58,34 @@ char readable[256] =
 	'x', 'y', 'z', '{', '|', '}', '~', '_'
 };
 
+// Log_Dir_Callback: called when a log_dir is changed
+void Log_Dir_Callback (struct cvar_s *var, char *oldvalue)
+{
+	char *t = var->string;
+
+	// sanity check for directory
+	if (strstr(t, "..") || strstr(t, ":") || *t == '/' || *t == '\\')
+	{
+		Con_Printf(S_NOTICE "%s forced to default due to invalid characters.\n", var->name);
+		// recursion is avoided by assuming the default value is sane
+		Cvar_ForceSet(var, var->defaultstr);
+	}
+}
+
+// Log_Name_Callback: called when a log_dir is changed
+void Log_Name_Callback (struct cvar_s *var, char *oldvalue)
+{
+	char *t = var->string;
+
+	// sanity check for directory
+	if (strstr(t, "..") || strstr(t, ":") || strstr(t, "/") || strstr(t, "\\"))
+	{
+		Con_Printf(S_NOTICE "%s forced to default due to invalid characters.\n", var->name);
+		// recursion is avoided by assuming the default value is sane
+		Cvar_ForceSet(var, var->defaultstr);
+	}
+}
+
 // Con_Log: log string to console log
 void Con_Log (char *s)
 {
@@ -66,31 +98,6 @@ void Con_Log (char *s)
 	if (!log_enable.value)
 		return;
 
-	// cvar sanity checks
-	if (log_dir.modified)
-	{
-		t = log_dir.string;
-		if (strstr(t, "..") || strstr(t, ":") || *t == '/' || *t == '\\')
-		{
-			Con_Printf("log_dir forced to default due to invalid characters.\n");
-			Cvar_ForceSet(&log_dir, log_dir.defaultstr);
-		}
-
-		log_dir.modified = false;
-	}
-
-	if (log_name.modified)
-	{
-		t = log_name.string;
-		if (strstr(t, "..") || strstr(t, ":") || strstr(t, "/") || strstr(t, "\\"))
-		{
-			Con_Printf("log_name forced to default due to invalid characters.\n");
-			Cvar_ForceSet(&log_name, log_name.defaultstr);
-		}
-
-		log_name.modified = false;
-	}
-
 	// get directory/filename
 	d = gamedirfile;
 	if (log_dir.string[0])
diff --git a/engine/gl/gl_bloom.c b/engine/gl/gl_bloom.c
index dba9ec643..b028773da 100644
--- a/engine/gl/gl_bloom.c
+++ b/engine/gl/gl_bloom.c
@@ -136,7 +136,7 @@ void R_Bloom_InitBackUpTexture( int width, int height )
 
 	r_screenbackuptexture_size = width;
 
-	r_bloombackuptexture = GL_LoadTexture32("***r_bloombackuptexture***", width, height, data, false, false );
+	r_bloombackuptexture = GL_LoadTexture32("***r_bloombackuptexture***", width, height, (unsigned int*)data, false, false );
 	
 	Z_Free ( data );
 }
@@ -175,7 +175,7 @@ void R_Bloom_InitEffectTexture( void )
 
 	data = Z_Malloc( BLOOM_SIZE * BLOOM_SIZE * 4 );
 
-	r_bloomeffecttexture = GL_LoadTexture32("***r_bloomeffecttexture***", BLOOM_SIZE, BLOOM_SIZE, data, false, false );
+	r_bloomeffecttexture = GL_LoadTexture32("***r_bloomeffecttexture***", BLOOM_SIZE, BLOOM_SIZE, (unsigned int*)data, false, false );
 	
 	Z_Free ( data );
 }
@@ -229,7 +229,7 @@ void R_Bloom_InitTextures( void )
 	{
 		r_screendownsamplingtexture_size = (int)(BLOOM_SIZE * 2);
 		data = Z_Malloc( r_screendownsamplingtexture_size * r_screendownsamplingtexture_size * 4 );
-		r_bloomdownsamplingtexture = GL_LoadTexture32("***r_bloomdownsamplingtexture***", r_screendownsamplingtexture_size, r_screendownsamplingtexture_size, data, false, false );
+		r_bloomdownsamplingtexture = GL_LoadTexture32("***r_bloomdownsamplingtexture***", r_screendownsamplingtexture_size, r_screendownsamplingtexture_size, (unsigned int*)data, false, false );
 		Z_Free ( data );
 	}