diff -up meshlab-1.3.1/meshlab/src/meshlab/main.cpp.ply-numeric meshlab-1.3.1/meshlab/src/meshlab/main.cpp
--- meshlab-1.3.1/meshlab/src/meshlab/main.cpp.ply-numeric	2011-09-14 04:42:55.000000000 -0600
+++ meshlab-1.3.1/meshlab/src/meshlab/main.cpp	2011-10-21 14:16:50.910980112 -0600
@@ -31,6 +31,8 @@ int main(int argc, char *argv[])
   QLocale::setDefault(QLocale::C);
   QCoreApplication::setOrganizationName("VCG");
   QCoreApplication::setApplicationName("MeshLab");
+
+  std::setlocale(LC_NUMERIC, "C");
 	
 		if(argc>1)	
 		{