diff -r f19d5c852f9b -r cd42f77d30c4 hgext/rebase.py
--- a/hgext/rebase.py	Fri Dec 02 18:20:32 2011 +0100
+++ b/hgext/rebase.py	Fri Jan 20 12:04:45 2012 -0200
@@ -210,7 +210,7 @@
                       " unrebased descendants"),
                     hint=_('use --keep to keep original changesets'))
             elif not keepf and not repo[root].mutable():
-                raise util.Abort(_("Can't rebase immutable changeset %s")
+                raise util.Abort(_("can't rebase immutable changeset %s")
                                  % repo[root],
                                  hint=_('see hg help phases for details'))
             else: