diff --git a/code/B3DImporter.cpp b/code/B3DImporter.cpp
index 98b030417..dbde8769c 100644
--- a/code/B3DImporter.cpp
+++ b/code/B3DImporter.cpp
@@ -170,7 +170,8 @@ aiVector3D B3DImporter::ReadVec3(){
 
 // ------------------------------------------------------------------------------------------------
 aiQuaternion B3DImporter::ReadQuat(){
-	float w=ReadFloat();
+	// (aramis_acg) Fix to adapt the loader to changed quat orientation
+	float w=-ReadFloat();
 	float x=ReadFloat();
 	float y=ReadFloat();
 	float z=ReadFloat();
diff --git a/code/MS3DLoader.cpp b/code/MS3DLoader.cpp
index cd846e0d0..6fad24f41 100644
--- a/code/MS3DLoader.cpp
+++ b/code/MS3DLoader.cpp
@@ -552,7 +552,12 @@ void MS3DImporter::InternReadFile( const std::string& pFile,
 		aiNode* nd = rt->mChildren[i] = new aiNode();
 
 		const TempGroup& g = groups[i];
-		nd->mName = aiString(g.name);
+
+		// we need to generate an unique name for all mesh nodes.
+		// since we want to keep the group name, a prefix is
+		// prepended.
+		nd->mName = aiString("<MS3DMesh>_");
+		nd->mName.Append(g.name);
 		nd->mParent = rt;
 
 		nd->mMeshes = new unsigned int[nd->mNumMeshes = 1];