# diff -u /tmp/Main.py /usr/share/python-support/rdiff-backup/rdiff_backup/Main.py 
--- /tmp/Main.py	2009-11-26 19:05:14.000000000 +0100
+++ /usr/share/python-support/rdiff-backup/rdiff_backup/Main.py	2009-11-26 22:21:46.585994896 +0100
@@ -715,8 +715,10 @@
 		Log.FatalError(("Bad directory %s.\n" % (rp.path,)) +
 		  "It doesn't appear to be an rdiff-backup destination dir")
 	try:
-		Globals.rbdir.conn.fs_abilities.single_set_globals(Globals.rbdir,
-														   read_only)
+		if action == "remove-older-than":
+			Globals.rbdir.conn.fs_abilities.single_set_globals(Globals.rbdir, 1)
+		else:
+			Globals.rbdir.conn.fs_abilities.single_set_globals(Globals.rbdir,read_only)
 	except (OSError, IOError), exc:
 		print("\n")
 		Log.FatalError("Could not open rdiff-backup directory\n\n%s\n\n"