Index: src/cairo.c
===================================================================
RCS file: /cvs/cairo/cairo/src/cairo.c,v
retrieving revision 1.126
diff -u -r1.126 cairo.c
--- src/cairo.c	19 Aug 2005 06:10:41 -0000	1.126
+++ src/cairo.c	19 Aug 2005 15:03:14 -0000
@@ -1261,15 +1261,19 @@
 		 double x, double y,
 		 double width, double height)
 {
+    double x2 = x+width;
+    double y2 = y+width;
+
     if (cr->status) {
 	_cairo_set_error (cr, cr->status);
 	return;
     }
 
+    /* don't use cairo_rel_line_to to avoid rounding errors */
     cairo_move_to (cr, x, y);
-    cairo_rel_line_to (cr, width, 0);
-    cairo_rel_line_to (cr, 0, height);
-    cairo_rel_line_to (cr, -width, 0);
+    cairo_line_to (cr, x2, y);
+    cairo_line_to (cr, x2, y2);
+    cairo_line_to (cr, x, y2);
     cairo_close_path (cr);
 }