--- /tmp/bintree.py	2013-11-05 04:12:41.138995391 -0500
+++ /usr/lib/portage/pym/portage/dbapi/bintree.py	2013-11-05 04:21:44.098975898 -0500
@@ -939,10 +939,25 @@
 							if not fcmd:
 								raise EnvironmentError("FETCHCOMMAND is unset")
 
-						fd, tmp_filename = tempfile.mkstemp()
-						tmp_dirname, tmp_basename = os.path.split(tmp_filename)
-						os.close(fd)
-
+						# old method completely breaks timestamp caching
+						# make an archive copy of our file (preserves timestamps)
+						# cd to temp directory
+						# fetch file
+						# cd to $cwd so wget analyses the unqualified basename
+						tmp_dirname = tempfile.mkdtemp()
+						fetch_cwd = os.getcwd()
+						os.chdir(tmp_dirname)
+						tmp_basename = os.path.basename(pkgindex_file)
+						tmp_filename = os.path.join(tmp_dirname, tmp_basename)
+						f_pkgindex_file = open(pkgindex_file, 'rb')
+						f_tmpfile = open(tmp_basename, 'wb')
+						f_tmpfile.write(f_pkgindex_file.read())
+						f_tmpfile.close()
+						f_pkgindex_file.close()
+						os.utime(tmp_basename, (int(local_timestamp), int(local_timestamp)))
+						tmp_stat_original = os.stat(tmp_filename)
+						fcmd = fcmd.replace('-O "${DISTDIR}/${FILE}"', '-N')
+						
 						fcmd_vars = {
 							"DISTDIR": tmp_dirname,
 							"FILE": tmp_basename,
@@ -957,9 +972,20 @@
 
 						success = portage.getbinpkg.file_get(
 							fcmd=fcmd, fcmd_vars=fcmd_vars)
+
+						# return from whence we came, cleanups?
+						os.chdir(fetch_cwd)
+
+						if tmp_stat_original.st_ctime == os.stat(tmp_filename).st_ctime:
+							# set to the tmpdir so both are deleted
+							tmp_filename = tmp_dirname
+							raise UseCachedCopyOfRemoteIndex()
+						
 						if not success:
 							raise EnvironmentError("%s failed" % (setting,))
 						f = open(tmp_filename, 'rb')
+						# set to the tmpdir so both are deleted
+						tmp_filename = tmp_dirname
 
 				f_dec = codecs.iterdecode(f,
 					_encodings['repo.content'], errors='replace')