=== modified file 'src/StelMainGraphicsView.cpp'
--- src/StelMainGraphicsView.cpp	2012-02-25 14:13:20 +0000
+++ src/StelMainGraphicsView.cpp	2012-04-19 20:32:06 +0000
@@ -212,6 +212,14 @@
 
 	backItem = new QGraphicsWidget();
 	backItem->setFocusPolicy(Qt::NoFocus);
+	
+	// Workaround (see Bug #940638) Although we have already explicitly set 
+	// LC_NUMERIC to "C" in main.cpp there seems to be a bug in OpenGL where
+	// it will silently reset LC_NUMERIC to the value of LC_ALL during OpenGL
+	// initialization. This has been observed on Ubuntu 11.10 under certain 
+	// circumstances, so here we set it again just to be on the safe side. 
+	setlocale(LC_NUMERIC, "C");
+	// End workaround
 }
 
 StelMainGraphicsView::~StelMainGraphicsView()