diff -r 03f314e32058 -r f12fd2410a60 hgext/obsolete.py
--- a/hgext/obsolete.py	Tue Mar 20 11:02:11 2012 +0100
+++ b/hgext/obsolete.py	Tue Mar 20 15:10:53 2012 +0100
@@ -189,6 +189,13 @@
 ### Other Extension compat
 ############################
 
+
+def buildstate(orig, repo, dest, rebaseset, detach):
+    """wrapper for rebase 's buildstate that exclude obsolete changeset"""
+    rebaseset = repo.revs('%ld - extinct()', rebaseset)
+    return orig(repo, dest, rebaseset, detach)
+
+
 def concludenode(orig, repo, rev, *args, **kwargs):
     """wrapper for rebase 's concludenode that set obsolete relation"""
     newrev = orig(repo, rev, *args, **kwargs)
@@ -219,6 +226,7 @@
     try:
         rebase = extensions.find('rebase')
         if rebase:
+            extensions.wrapfunction(rebase, 'buildstate', buildstate)
             extensions.wrapfunction(rebase, 'concludenode', concludenode)
             extensions.wrapcommand(rebase.cmdtable, "rebase", cmdrebase)
     except KeyError: