Index: src/java/org/apache/ivy/plugins/resolver/RepositoryResolver.java
===================================================================
--- src/java/org/apache/ivy/plugins/resolver/RepositoryResolver.java	(revision 1518042)
+++ src/java/org/apache/ivy/plugins/resolver/RepositoryResolver.java	(working copy)
@@ -91,6 +91,10 @@
         try {
             if (!versionMatcher.isDynamic(mrid) || isAlwaysCheckExactRevision()) {
                 String resourceName = IvyPatternHelper.substitute(pattern, mrid, artifact);
+                
+                // replace any '\' characters in the URL with '/'
+                resourceName = resourceName.replaceAll("\\\\", "/");
+                
                 Message.debug("\t trying " + resourceName);
                 logAttempt(resourceName);
                 Resource res = repository.getResource(resourceName);
Index: test/java/org/apache/ivy/plugins/resolver/URLResolverTest.java
===================================================================
--- test/java/org/apache/ivy/plugins/resolver/URLResolverTest.java	(revision 1518042)
+++ test/java/org/apache/ivy/plugins/resolver/URLResolverTest.java	(working copy)
@@ -305,6 +312,25 @@
         assertEquals("1.4.4", rmr.getId().getRevision());
     }
 
+    public void testErrantBackslash() throws Exception {
+        String ibiblioRoot = IBiblioHelper.getIBiblioMirror();
+        if (ibiblioRoot == null) {
+            return;
+        }
+
+        URLResolver resolver = new URLResolver();
+        resolver.setSettings(settings);
+        resolver.addArtifactPattern(ibiblioRoot + "/[organisation]/\\[module]/[revision]/[artifact]-[revision].[type]");
+        resolver.setName("test");
+        assertEquals("test", resolver.getName());
+
+        ModuleRevisionId mrid = ModuleRevisionId.newInstance("asm", "asm", "1.4.3");
+        ResolvedModuleRevision rmr = resolver.getDependency(new DefaultDependencyDescriptor(mrid,
+                false), data);
+        assertNotNull(rmr);
+        assertEquals("1.4.3", rmr.getId().getRevision());
+    }
+
     public void testUnknown() throws Exception {
         String ibiblioRoot = IBiblioHelper.getIBiblioMirror();
         if (ibiblioRoot == null) {