Index: src/java/org/apache/avalon/phoenix/components/classloader/DefaultLoaderResolver.java
===================================================================
--- src/java/org/apache/avalon/phoenix/components/classloader/DefaultLoaderResolver.java	(revision 1214776)
+++ src/java/org/apache/avalon/phoenix/components/classloader/DefaultLoaderResolver.java	(working copy)
@@ -175,7 +175,7 @@
                 {
                     try
                     {
-                        urls.add( file.toURL() );
+                        urls.add( toURL(file) );
                     }
                     catch ( final MalformedURLException mue )
                     {
Index: src/java/org/apache/avalon/phoenix/components/classloader/SarLoaderResolver.java
===================================================================
--- src/java/org/apache/avalon/phoenix/components/classloader/SarLoaderResolver.java	(revision 1214776)
+++ src/java/org/apache/avalon/phoenix/components/classloader/SarLoaderResolver.java	(working copy)
@@ -148,7 +148,7 @@
             ResourceUtil.getFileForResource( location,
                                              getBaseDirectory(),
                                              m_workDirectory );
-        return file.toURL();
+        return toURL(file);
     }
 
     /**
Index: src/java/org/apache/avalon/phoenix/components/classloader/SimpleLoaderResolver.java
===================================================================
--- src/java/org/apache/avalon/phoenix/components/classloader/SimpleLoaderResolver.java	(revision 1214776)
+++ src/java/org/apache/avalon/phoenix/components/classloader/SimpleLoaderResolver.java	(working copy)
@@ -52,6 +52,7 @@
 import java.io.File;
 import java.io.IOException;
 import java.net.JarURLConnection;
+import java.net.MalformedURLException;
 import java.net.URL;
 import java.net.URLClassLoader;
 import java.util.ArrayList;
@@ -134,7 +135,7 @@
         }
         final OptionalPackage optionalPackage =
             getManager().getOptionalPackage( extension );
-        return optionalPackage.getFile().toURL();
+        return toURL(optionalPackage.getFile());
     }
 
     /**
@@ -148,7 +149,7 @@
         throws Exception
     {
         final File file = getFileFor( location );
-        String url = file.toURL().toString();
+        String url = toURL(file).toString();
         if( file.isDirectory() )
         {
             url += "/";
@@ -234,7 +235,7 @@
         for( int i = 0; i < files.length; i++ )
         {
             final File file = files[ i ];
-            classpathSet.add( file.toURL() );
+            classpathSet.add( toURL(file) );
         }
 
         //Define final classpath with all dependencies added
@@ -453,4 +454,8 @@
 
         return (Manifest[])manifests.toArray( new Manifest[ 0 ] );
     }
+    
+    protected URL toURL(File file) throws MalformedURLException {
+    	return file.toURI().toURL();
+    }
 }