Index: tika-parsers/src/main/java/org/apache/tika/parser/asm/XHTMLClassVisitor.java
===================================================================
--- tika-parsers/src/main/java/org/apache/tika/parser/asm/XHTMLClassVisitor.java	(revision 1442635)
+++ tika-parsers/src/main/java/org/apache/tika/parser/asm/XHTMLClassVisitor.java	(working copy)
@@ -38,7 +38,7 @@
  * Class visitor that generates XHTML SAX events to describe the
  * contents of the visited class.
  */
-class XHTMLClassVisitor implements ClassVisitor {
+class XHTMLClassVisitor extends ClassVisitor {
 
     private final XHTMLContentHandler xhtml;
 
@@ -49,6 +49,7 @@
     private String packageName;
 
     public XHTMLClassVisitor(ContentHandler handler, Metadata metadata) {
+        super(Opcodes.ASM4);
         this.xhtml = new XHTMLContentHandler(handler, metadata);
         this.metadata = metadata;
     }
Index: tika-parsers/pom.xml
===================================================================
--- tika-parsers/pom.xml	(revision 1442635)
+++ tika-parsers/pom.xml	(working copy)
@@ -151,9 +151,9 @@
       <version>1.2.1</version>
     </dependency>
     <dependency>
-      <groupId>asm</groupId>
-      <artifactId>asm</artifactId>
-      <version>3.1</version>
+      <groupId>org.ow2.asm</groupId>
+      <artifactId>asm-debug-all</artifactId>
+      <version>4.1</version>
     </dependency>
     <dependency>
       <groupId>com.googlecode.mp4parser</groupId> 
Index: CHANGES.txt
===================================================================
--- CHANGES.txt	(revision 1442635)
+++ CHANGES.txt	(working copy)
@@ -8,6 +8,9 @@
 
   * MP3: Audio duration is now extracted (TIKA-991)
 
+  * Java .class files: upgraded from ASM 3.1 to ASM 4.1 for parsing
+    the bytecode (TIKA-1053).
+
 Release 1.3 - 01/19/2013
 
   * Mimetype definitions added for more common programming languages,