diff --git a/HTMLFormatter.py b/HTMLFormatter.py
index 548766b..92dc727 100644
--- a/HTMLFormatter.py
+++ b/HTMLFormatter.py
@@ -66,12 +66,13 @@ class XMLishFormatter (BaseFormatter.BaseFormatter):
             if file_.filetype and file_.filetype.endswith('images'):
                 dedupable[file_.filetype] = file_
         do_dedupe = False
-        for ft in ['epub', 'kindle', 'pdf']:
+        for ft in ['epub', 'kindle', 'pdf', 'html']:
             if ft + '.images' in dedupable and ft + '.noimages' in dedupable:
-                if dedupable[ft + '.images'].extent == dedupable[ft + '.noimages'].extent:
+                # because of timestamps, identical files may vary by a bit or 2
+                if abs (dedupable[ft + '.images'].extent - dedupable[ft + '.noimages'].extent) < 3:
                     do_dedupe = True
         if do_dedupe:
-            for ft in ['epub', 'kindle', 'pdf']:
+            for ft in ['epub', 'kindle', 'pdf', 'html']:
                 if ft + '.images' in dedupable and ft + '.noimages' in dedupable:
                     dc.files.remove(dedupable[ft + '.images'])