Index: lucene/src/java/org/apache/lucene/index/codecs/standard/StandardPostingsReaderImpl.java
===================================================================
--- lucene/src/java/org/apache/lucene/index/codecs/standard/StandardPostingsReaderImpl.java	(revision 955681)
+++ lucene/src/java/org/apache/lucene/index/codecs/standard/StandardPostingsReaderImpl.java	(working copy)
@@ -159,7 +159,7 @@
       docsEnum = new SegmentDocsEnum(freqIn);
     } else {
       docsEnum = (SegmentDocsEnum) reuse;
-      if (docsEnum.freqIn != freqIn) {
+      if (docsEnum.startFreqIn != freqIn) {
         // If you are using ParellelReader, and pass in a
         // reused DocsEnum, it could have come from another
         // reader also using standard codec
@@ -186,6 +186,7 @@
   // Decodes only docs
   private class SegmentDocsEnum extends DocsEnum {
     final IndexInput freqIn;
+    final IndexInput startFreqIn;
 
     boolean omitTF;                               // does current field omit term freq?
     boolean storePayloads;                        // does current field store payloads?
@@ -204,6 +205,7 @@
     DefaultSkipListReader skipper;
 
     public SegmentDocsEnum(IndexInput freqIn) throws IOException {
+      startFreqIn = freqIn;
       this.freqIn = (IndexInput) freqIn.clone();
     }