diff -r 1d38c52eb89e src/widget.cpp
--- a/src/widget.cpp	Sun Apr 05 17:48:08 2009 +0000
+++ b/src/widget.cpp	Sun Apr 05 22:34:41 2009 +0200
@@ -1365,17 +1365,26 @@
 	}
 
 	bool same = true;
+	bool empty = false;
+	bool same_empty = true;
 	for(int idx = 0; ; idx++) {
 		const Widget *ow = orig + idx;
 		const Widget *gw = gen + idx;
+		empty = false;
 
 		CHECK(type, "%d")
 		CHECK(display_flags, "0x%x")
 		CHECK(colour, "%d")
-		CHECK_COORD(left)
-		CHECK_COORD(right)
-		CHECK_COORD(top)
-		CHECK_COORD(bottom)
+		if (0 == ow->left && 0 == ow->right && 0 == ow->top && 0 == ow->bottom && ow->type != WWT_LAST) { //original widget is empty
+			empty = true;
+			same_empty = gw->left == gw->right + 1 && gw->display_flags == (gw->display_flags & RESIZE_NONE); // check if generated widget is also empty
+		}
+		if (!empty || (empty && !same_empty)) {
+			CHECK_COORD(left)
+			CHECK_COORD(right)
+			CHECK_COORD(top)
+			CHECK_COORD(bottom)
+		}
 		CHECK(data, "%u")
 		CHECK(tooltips, "%u")