Index: src/java/org/apache/nutch/crawl/Injector.java
===================================================================
--- src/java/org/apache/nutch/crawl/Injector.java	(revision 411154)
+++ src/java/org/apache/nutch/crawl/Injector.java	(working copy)
@@ -64,7 +64,7 @@
       throws IOException {
       UTF8 value = (UTF8)val;
       String url = value.toString();              // value is line of text
-      // System.out.println("url: " +url);
+      if(url.trim().length() == 0){ return; }     // ignore empty lines
       try {
         url = urlNormalizer.normalize(url);       // normalize the url
         url = filters.filter(url);             // filter the url