Index: source/blender/editors/space_view3d/view3d_draw.c
===================================================================
--- source/blender/editors/space_view3d/view3d_draw.c	(revision 38635)
+++ source/blender/editors/space_view3d/view3d_draw.c	(working copy)
@@ -611,6 +611,7 @@
 	glLineWidth(2);
 
 	glEnable(GL_BLEND);
+	glEnable(GL_LINE_SMOOTH);
 	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 
 	/* X */
@@ -673,6 +674,7 @@
 	
 	glLineWidth(1.0);
 	glDisable(GL_BLEND);
+	glDisable(GL_LINE_SMOOTH);
 }
 
 
Index: source/blender/editors/transform/transform_manipulator.c
===================================================================
--- source/blender/editors/transform/transform_manipulator.c	(revision 38635)
+++ source/blender/editors/transform/transform_manipulator.c	(working copy)
@@ -1520,6 +1520,7 @@
 
 		glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
 		glEnable(GL_BLEND);
+		glEnable(GL_LINE_SMOOTH);
 		if(v3d->twtype & V3D_MANIP_ROTATE) {
 
 			if(G.rt==3) {
@@ -1537,6 +1538,7 @@
 		}
 
 		glDisable(GL_BLEND);
+		glDisable(GL_LINE_SMOOTH);
 	}
 }