Index: src/main/java/org/codehaus/plexus/container/initialization/InitializeResourcesPhase.java
===================================================================
--- src/main/java/org/codehaus/plexus/container/initialization/InitializeResourcesPhase.java	(revision 3369)
+++ src/main/java/org/codehaus/plexus/container/initialization/InitializeResourcesPhase.java	(working copy)
@@ -33,7 +33,7 @@
 
                     if ( directory.exists() && directory.isDirectory() )
                     {
-                        context.getContainer().getContainerRealm().addConstituent( directory.toURL() );
+                        context.getContainer().getContainerRealm().addConstituent( directory.toURI().toURL() );
                     }
                 }
                 else
Index: src/main/java/org/codehaus/plexus/DefaultPlexusContainer.java
===================================================================
--- src/main/java/org/codehaus/plexus/DefaultPlexusContainer.java	(revision 3369)
+++ src/main/java/org/codehaus/plexus/DefaultPlexusContainer.java	(working copy)
@@ -835,7 +835,7 @@
     {
         try
         {
-            containerRealm.addConstituent( jar.toURL() );
+            containerRealm.addConstituent( jar.toURI().toURL() );
 
             //TODO: might not necessarily want to discover components here.
             discoverComponents( containerRealm );