Index: fop-core/src/main/java/org/apache/fop/area/CachedRenderPagesModel.java
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- fop-core/src/main/java/org/apache/fop/area/CachedRenderPagesModel.java	(revision )
+++ fop-core/src/main/java/org/apache/fop/area/CachedRenderPagesModel.java	(revision )
@@ -27,6 +27,7 @@
 import java.io.ObjectOutputStream;
 import java.io.OutputStream;
 import java.net.URI;
+import java.security.SecureRandom;
 import java.util.HashMap;
 import java.util.Iterator;
 import java.util.Map;
@@ -55,6 +56,7 @@
     private final URI tempBaseURI;
     private static final TempResourceURIGenerator TEMP_URI_GENERATOR
             = new TempResourceURIGenerator("cached-pages");
+    private static final SecureRandom sr = new SecureRandom();
 
     /**
      * Main Constructor
@@ -123,7 +125,7 @@
         try {
             // save page to cache
             ObjectOutputStream tempstream;
-            String fname = "fop-page-" + page.getPageIndex() + ".ser";
+            String fname = "fop-page-" + page.getPageIndex() + "-" + sr.nextLong() + ".ser";
             URI tempURI = tempBaseURI.resolve(fname);
             OutputStream outStream = renderer.getUserAgent().getResourceResolver().getOutputStream(tempURI);
             tempstream = new ObjectOutputStream(new BufferedOutputStream(outStream));