--- a/hgext/extdiff.py	Thu Jun 26 13:58:24 2008 -0500
+++ b/hgext/extdiff.py	Thu Jun 26 14:35:46 2008 -0500
@@ -52,7 +52,6 @@
 
 def snapshot_node(ui, repo, files, node, tmproot):
     '''snapshot files as of some revision'''
-    mf = repo.changectx(node).manifest()
     dirname = os.path.basename(repo.root)
     if dirname == "":
         dirname = "root"
@@ -61,17 +60,18 @@
     os.mkdir(base)
     ui.note(_('making snapshot of %d files from rev %s\n') %
             (len(files), short(node)))
+    ctx = repo[node]
     for fn in files:
-        if not fn in mf:
+        wfn = util.pconvert(fn)
+        if not wfn in ctx:
             # skipping new file after a merge ?
             continue
-        wfn = util.pconvert(fn)
         ui.note('  %s\n' % wfn)
         dest = os.path.join(base, wfn)
         destdir = os.path.dirname(dest)
         if not os.path.isdir(destdir):
             os.makedirs(destdir)
-        data = repo.wwritedata(wfn, repo.file(wfn).read(mf[wfn]))
+        data = repo.wwritedata(wfn, ctx[wfn].data())
         open(dest, 'wb').write(data)
     return dirname