diff -r 0d22420c0b65 core.startup/test/unit/src/org/netbeans/core/startup/layers/CountingSecurityManager.java
--- a/core.startup/test/unit/src/org/netbeans/core/startup/layers/CountingSecurityManager.java	Mon Mar 02 08:45:36 2009 +0100
+++ b/core.startup/test/unit/src/org/netbeans/core/startup/layers/CountingSecurityManager.java	Mon Mar 02 12:59:15 2009 +0100
@@ -443,7 +443,7 @@
         if (file.endsWith("tests.jar")) {
             return false;
         }
-        if (file.startsWith(System.getProperty("java.home").replaceAll("/[^/]*$", ""))) {
+        if (file.startsWith(System.getProperty("java.home").replaceAll("[/\\\\][^/\\\\]*$", ""))) {
             return false;
         }
         if (file.startsWith(System.getProperty("netbeans.home") + File.separator + "lib")) {
diff -r 0d22420c0b65 ide.ergonomics/test/unit/src/org/netbeans/modules/ide/ergonomics/fod/FodDataObjectFactoryTest.java
--- a/ide.ergonomics/test/unit/src/org/netbeans/modules/ide/ergonomics/fod/FodDataObjectFactoryTest.java	Mon Mar 02 08:45:36 2009 +0100
+++ b/ide.ergonomics/test/unit/src/org/netbeans/modules/ide/ergonomics/fod/FodDataObjectFactoryTest.java	Mon Mar 02 12:59:15 2009 +0100
@@ -45,6 +45,7 @@
 import java.util.Collections;
 import java.util.HashSet;
 import java.util.logging.Level;
+import java.util.logging.Logger;
 import junit.framework.Test;
 import org.netbeans.junit.NbModuleSuite;
 import org.netbeans.junit.NbTestCase;
diff -r 0d22420c0b65 ide.kit/test/qa-functional/src/org/netbeans/test/ide/CountingSecurityManager.java
--- a/ide.kit/test/qa-functional/src/org/netbeans/test/ide/CountingSecurityManager.java	Mon Mar 02 08:45:36 2009 +0100
+++ b/ide.kit/test/qa-functional/src/org/netbeans/test/ide/CountingSecurityManager.java	Mon Mar 02 12:59:15 2009 +0100
@@ -443,7 +443,7 @@
         if (file.endsWith("tests.jar")) {
             return false;
         }
-        if (file.startsWith(System.getProperty("java.home").replaceAll("/[^/]*$", ""))) {
+        if (file.startsWith(System.getProperty("java.home").replaceAll("[/\\\\][^/\\\\]*$", ""))) {
             return false;
         }
         if (!acceptFileInDir(file, System.getProperty("netbeans.home"))) {
diff -r 0d22420c0b65 nbjunit/src/org/netbeans/junit/Log.java
--- a/nbjunit/src/org/netbeans/junit/Log.java	Mon Mar 02 08:45:36 2009 +0100
+++ b/nbjunit/src/org/netbeans/junit/Log.java	Mon Mar 02 12:59:15 2009 +0100
@@ -304,8 +304,11 @@
                 sb.append("\n  ").append(s.toString());
             }
         }
-        
-        getLog(record).println(sb.toString());
+        try {
+            getLog(record).println(sb.toString());
+        } catch (LinkageError err) {
+            // prevent circular references
+        }
 
 
         messages.append(sb.toString());
diff -r 0d22420c0b65 o.n.bootstrap/src/org/netbeans/JarClassLoader.java
--- a/o.n.bootstrap/src/org/netbeans/JarClassLoader.java	Mon Mar 02 08:45:36 2009 +0100
+++ b/o.n.bootstrap/src/org/netbeans/JarClassLoader.java	Mon Mar 02 12:59:15 2009 +0100
@@ -77,7 +77,7 @@
 import java.util.logging.Level;
 import java.util.logging.Logger;
 import java.util.zip.ZipEntry;
-import org.openide.util.Exceptions;
+import org.openide.util.Utilities;
 
 /**
  * A ProxyClassLoader capable of loading classes from a set of jar files
@@ -379,21 +379,23 @@
             return file.getPath();
         }
 
-        private static String toURI(File file) {
-            String sp = slashify(file.getPath(), false);
-            if (sp.startsWith("//")) // NOI18N
-                sp = "//" + sp; // NOI18N
-            return "jar:file:"+ sp +"!/"; // NOI18N
-        }
-        private static String slashify(String path, boolean isDirectory) {
-            String p = path;
-            if (File.separatorChar != '/')
-                p = p.replace(File.separatorChar, '/');
-            if (!p.startsWith("/"))
-                p = "/" + p;
-            if (!p.endsWith("/") && isDirectory)
-                p = p + "/";
-            return p;
+        private static String toURI(final File file) {
+            class VFile extends File {
+                public VFile() {
+                    super(file.getPath());
+                }
+
+                @Override
+                public boolean isDirectory() {
+                    return false;
+                }
+
+                @Override
+                public File getAbsoluteFile() {
+                    return this;
+                }
+            }
+            return "jar:" + new VFile().toURI() + "!/"; // NOI18N
         }
 
         @Override
@@ -740,12 +742,12 @@
                 throw new IOException("Malformed JAR-protocol URL: " + u);
             }
             int from;
-            if (url.startsWith("file:")) {
-                from = 5;
+            if (url.startsWith("file:/")) {
+                from = Utilities.isWindows() ? 6 : 5;
             } else {
                 from = 0;
             }
-            String jar = url.substring(from, bang);
+            String jar = url.substring(from, bang).replace('/', File.separatorChar);
             String _name = url.substring(bang+2);
             Source _src = Source.sources.get(jar);
             if (_src == null) {