diff --git a/sp/src/game/shared/mapbase/vscript_funcs_shared.cpp b/sp/src/game/shared/mapbase/vscript_funcs_shared.cpp
index 4c6d4817..8a36c7a0 100644
--- a/sp/src/game/shared/mapbase/vscript_funcs_shared.cpp
+++ b/sp/src/game/shared/mapbase/vscript_funcs_shared.cpp
@@ -560,16 +560,18 @@ bool CAnimEventTInstanceHelper::Set( void *p, const char *pszKey, ScriptVariant_
 
 	animevent_t *ani = ((animevent_t *)p);
 	if (FStrEq( pszKey, "event" ))
-		ani->event = variant;
+		return variant.AssignTo( &ani->event );
 	else if (FStrEq( pszKey, "options" ))
-		ani->options = variant;
+		// broken: return variant.AssignTo( &ani->options );
+		//         variant memory is freed afterwards
+		return false;
 	else if (FStrEq( pszKey, "cycle" ))
-		ani->cycle = variant;
+		return variant.AssignTo( &ani->cycle );
 	else if (FStrEq( pszKey, "eventtime" ))
-		ani->eventtime = variant;
+		return variant.AssignTo( &ani->eventtime );
 	else if (FStrEq( pszKey, "type" ))
-		ani->type = variant;
-	else if (FStrEq( pszKey, "source" ))
+		return variant.AssignTo( &ani->type );
+	else if (FStrEq( pszKey, "source" ) && variant.m_type == FIELD_HSCRIPT)
 	{
 		CBaseEntity *pEnt = ToEnt( variant.m_hScript );
 		if (pEnt)
diff --git a/sp/src/vscript/vscript_bindings_base.cpp b/sp/src/vscript/vscript_bindings_base.cpp
index 99b6194a..e6ea396b 100644
--- a/sp/src/vscript/vscript_bindings_base.cpp
+++ b/sp/src/vscript/vscript_bindings_base.cpp
@@ -440,13 +440,11 @@ bool CScriptColorInstanceHelper::Get( void *p, const char *pszKey, ScriptVariant
 bool CScriptColorInstanceHelper::Set( void *p, const char *pszKey, ScriptVariant_t &variant )
 {
 	Color *pClr = ((Color *)p);
-	if ( strlen(pszKey) == 1 )
+	int iVal;
+	if ( strlen(pszKey) == 1 && variant.AssignTo( &iVal ) )
 	{
-		int iVal;
-		variant.AssignTo( &iVal );
 		switch (pszKey[0])
 		{
-			// variant.AssignTo( &(*pClr)[0] );
 			case 'r':
 				(*pClr)[0] = iVal;
 				return true;
diff --git a/sp/src/vscript/vscript_bindings_math.cpp b/sp/src/vscript/vscript_bindings_math.cpp
index fb9c8334..3c83aeec 100644
--- a/sp/src/vscript/vscript_bindings_math.cpp
+++ b/sp/src/vscript/vscript_bindings_math.cpp
@@ -259,17 +259,13 @@ bool CScriptQuaternionInstanceHelper::Set( void *p, const char *pszKey, ScriptVa
 		switch (pszKey[0])
 		{
 			case 'x':
-				variant.AssignTo( &pQuat->x );
-				return true;
+				return variant.AssignTo( &pQuat->x );
 			case 'y':
-				variant.AssignTo( &pQuat->y );
-				return true;
+				return variant.AssignTo( &pQuat->y );
 			case 'z':
-				variant.AssignTo( &pQuat->z );
-				return true;
+				return variant.AssignTo( &pQuat->z );
 			case 'w':
-				variant.AssignTo( &pQuat->w );
-				return true;
+				return variant.AssignTo( &pQuat->w );
 		}
 	}
 	return false;