--- pym/portage_versions.py.orig	2007-03-17 14:20:36.000000000 +0100
+++ pym/portage_versions.py	2007-03-17 14:20:54.000000000 +0100
@@ -140,7 +140,8 @@
 			except ValueError:	r1 = 0
 			try:			r2 = int(s2[1])
 			except ValueError:	r2 = 0
-			return r1 - r2
+			if (r1 - r2):
+				return r1 - r2
 	
 	# the suffix part is equal to, so finally check the revision
 	if match1.group(10):