Index: work/remote/web/client/scripts/draw.js
===================================================================
--- work/remote/web/client/scripts/draw.js	(revision 6884)
+++ work/remote/web/client/scripts/draw.js	(revision 6885)
@@ -142,10 +142,10 @@
 		startAngle = 0;
 		deltaAngle = 360;
 	}
-	startAngle = (startAngle + 180) * Math.PI / 180;
+	startAngle = (-startAngle + 180) * Math.PI / 180;
 	deltaAngle = -deltaAngle * Math.PI / 180;
 	if (deltaAngle !== 0) {
-		this.cc.arc(x1, y1, xr, startAngle, startAngle + deltaAngle, true);
+		this.cc.arc(x1, y1, xr, startAngle, startAngle + deltaAngle, deltaAngle <= 0);
 		this.cc.stroke();
 	} else {
 		// this is a workaround, see http://stackoverflow.com/questions/7812514/drawing-a-dot-on-html5-canvas