Index: blender/source/blender/editors/transform/transform_manipulator.c
===================================================================
--- blender/source/blender/editors/transform/transform_manipulator.c	(revision 24226)
+++ blender/source/blender/editors/transform/transform_manipulator.c	(working copy)
@@ -986,6 +986,18 @@
 			drawcircball(GL_LINE_LOOP, unitmat[3], size, unitmat);
 		}
 	}
+	
+	/* Screen aligned trackball rot circle */
+	/* mostly copy/pasted from view rot circle below */
+	if(drawflags & MAN_ROT_T) {
+		glPushMatrix(); // save position
+		if(G.f & G_PICKSEL) glLoadName(MAN_ROT_T);
+		UI_ThemeColor(TH_TRANSFORM);
+		glTranslatef(0,0,size);  // move to the front to catch first hit when clicked.
+		drawcircball(GL_LINE_LOOP, unitmat[3], 0.2f*size, unitmat); // FIXME: wanders due to perspective.
+		glPopMatrix(); // restore position
+	}
+	
 	/* Screen aligned view rot circle */
 	if(drawflags & MAN_ROT_V) {
 		if(G.f & G_PICKSEL) glLoadName(MAN_ROT_V);