Index: src/main/java/hudson/plugins/tasks/parser/TaskScanner.java
===================================================================
--- src/main/java/hudson/plugins/tasks/parser/TaskScanner.java	(revision 10540)
+++ src/main/java/hudson/plugins/tasks/parser/TaskScanner.java	(working copy)
@@ -92,7 +92,7 @@
      *             if we can't read the file
      */
     public Collection<Task> scan(final InputStream file) throws IOException {
-        LineIterator lineIterator = IOUtils.lineIterator(file, null);
+        LineIterator lineIterator = IOUtils.lineIterator(file, "utf-8");
         List<Task> tasks = new ArrayList<Task>();
         for (int lineNumber = 1; lineIterator.hasNext(); lineNumber++) {
             String line = (String)lineIterator.next();
Index: src/main/java/hudson/plugins/tasks/util/SourceDetail.java
===================================================================
--- src/main/java/hudson/plugins/tasks/util/SourceDetail.java	(revision 10540)
+++ src/main/java/hudson/plugins/tasks/util/SourceDetail.java	(working copy)
@@ -9,6 +9,7 @@
 import java.io.FileInputStream;
 import java.io.IOException;
 import java.io.InputStream;
+import java.io.InputStreamReader;
 import java.io.StringReader;
 import java.io.StringWriter;
 import java.util.NoSuchElementException;
@@ -100,7 +101,7 @@
      * @throws IOException
      */
     public final String highlightSource(final InputStream file) throws IOException {
-        JavaSource source = new JavaSourceParser().parse(file);
+        JavaSource source = new JavaSourceParser().parse(new InputStreamReader(file, "utf-8"));
 
         JavaSource2HTMLConverter converter = new JavaSource2HTMLConverter();
         StringWriter writer = new StringWriter();