--- a/mercurial/merge.py	Fri Oct 03 00:07:38 2008 +0300
+++ b/mercurial/merge.py	Wed Oct 08 16:22:08 2008 -0500
@@ -185,8 +185,9 @@
                 if overwrite:
                     act("clobbering", "g", f, rflags)
                 # or are we going back in time and clean?
-                elif backwards and not n[20:]:
-                    act("reverting", "g", f, rflags)
+                elif backwards:
+                    if not n[20:] or not p2[f].cmp(p1[f].data()):
+                        act("reverting", "g", f, rflags)
                 # are both different from the ancestor?
                 elif n != a and m2[f] != a:
                     act("versions differ", "m", f, f, f, rflags, False)

--- a/tests/test-execute-bit.out	Fri Oct 03 00:07:38 2008 +0300
+++ b/tests/test-execute-bit.out	Wed Oct 08 16:22:08 2008 -0500
@@ -3,6 +3,6 @@
 % make sure we notice the change of mode if the cached size == -1
 n   0         -1 unset               a
 M a
-0 files updated, 0 files merged, 0 files removed, 0 files unresolved
+1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 d69afc33ff8a
 not executable -- whew