diff --git a/scm-core/src/main/java/sonia/scm/util/IOUtil.java b/scm-core/src/main/java/sonia/scm/util/IOUtil.java
index 5745dfde8b..2e2b6b7fd6 100644
--- a/scm-core/src/main/java/sonia/scm/util/IOUtil.java
+++ b/scm-core/src/main/java/sonia/scm/util/IOUtil.java
@@ -370,13 +370,13 @@ public final class IOUtil
   }
 
   /**
-   *   Method description
+   * Method description
    *
    *
-   *   @param file
+   * @param file
    * @param silent
    *
-   *   @throws IOException
+   * @throws IOException
    */
   public static void delete(File file, boolean silent) throws IOException
   {
@@ -388,22 +388,35 @@ public final class IOUtil
       {
         for (File child : children)
         {
-          delete(child);
+          delete(child, silent);
         }
       }
     }
 
-    if (!file.delete())
+    for (int i = 20; !file.delete(); i--)
     {
-      String message = "could not delete file ".concat(file.getPath());
+      if (i <= 20)
+      {
+        String message = "could not delete file ".concat(file.getPath());
 
-      if (silent)
-      {
-        logger.error(message);
+        if (silent)
+        {
+          logger.error(message);
+        }
+        else
+        {
+          throw new IOException(message);
+        }
       }
-      else
+
+      try
       {
-        throw new IOException(message);
+        logger.warn("sleep 250ms, because of delete for file {} failed", file);
+        Thread.sleep(250);
+      }
+      catch (InterruptedException ex)
+      {
+        logger.warn("sleep of delete method interrupted", ex);
       }
     }
   }
diff --git a/scm-core/src/main/java/sonia/scm/util/ValidationUtil.java b/scm-core/src/main/java/sonia/scm/util/ValidationUtil.java
index 0b1a23f7bb..d0b67c5472 100644
--- a/scm-core/src/main/java/sonia/scm/util/ValidationUtil.java
+++ b/scm-core/src/main/java/sonia/scm/util/ValidationUtil.java
@@ -55,16 +55,13 @@ public final class ValidationUtil
     "^[A-z0-9][\\w.-]*@[A-z0-9][\\w\\-\\.]+\\.[A-z0-9]{2,6}$";
 
   /** Field description */
-  private static final String REGEX_NAME = "^[A-z0-9\\.\\-_]+$";
+  private static final String REGEX_NAME =
+    "^[A-z0-9\\.\\-_@]|[^ ]([A-z0-9\\.\\-_@ ]*[A-z0-9\\.\\-_@]|[^ ])?$";
 
   /** Field description */
   private static final String REGEX_REPOSITORYNAME =
     "(?!^\\.\\.$)(?!^\\.$)(?!.*[\\\\\\[\\]])^[A-z0-9\\.][A-z0-9\\.\\-_/]*$";
 
-  /** Field description */
-  private static final String REGEX_USERNAME =
-    "^[A-z0-9\\.\\-_@]|[^ ]([A-z0-9\\.\\-_@ ]*[A-z0-9\\.\\-_@]|[^ ])?$";
-
   //~--- constructors ---------------------------------------------------------
 
   /**
@@ -185,10 +182,12 @@ public final class ValidationUtil
    * @param username
    *
    * @return
+   * @deprecated use {@link #isNameValid(String)}
    */
+  @Deprecated
   public static boolean isUsernameValid(String username)
   {
-    return Util.isNotEmpty(username) && username.matches(REGEX_USERNAME);
+    return isNameValid(username);
   }
 
   /**
diff --git a/scm-core/src/test/java/sonia/scm/util/ValidationUtilTest.java b/scm-core/src/test/java/sonia/scm/util/ValidationUtilTest.java
index a6ce29241c..620c2fae9d 100644
--- a/scm-core/src/test/java/sonia/scm/util/ValidationUtilTest.java
+++ b/scm-core/src/test/java/sonia/scm/util/ValidationUtilTest.java
@@ -102,14 +102,21 @@ public class ValidationUtilTest
     assertTrue(ValidationUtil.isNameValid("test.git"));
     assertTrue(ValidationUtil.isNameValid("Test123.git"));
     assertTrue(ValidationUtil.isNameValid("Test123-git"));
-    assertTrue(ValidationUtil.isNameValid("Test_repository-123.git"));
+    assertTrue(ValidationUtil.isNameValid("Test_user-123.git"));
+    assertTrue(ValidationUtil.isNameValid("test@scm-manager.de"));
+    assertTrue(ValidationUtil.isNameValid("test 123"));
+    assertTrue(ValidationUtil.isNameValid("t"));
 
     // false
-    assertFalse(ValidationUtil.isNameValid("test 123"));
-    assertFalse(ValidationUtil.isNameValid("test@123"));
+    assertFalse(ValidationUtil.isNameValid(" test 123"));
+    assertFalse(ValidationUtil.isNameValid(" test 123 "));
+    assertFalse(ValidationUtil.isNameValid("test 123 "));
     assertFalse(ValidationUtil.isNameValid("test/123"));
     assertFalse(ValidationUtil.isNameValid("test%123"));
     assertFalse(ValidationUtil.isNameValid("test:123"));
+    assertFalse(ValidationUtil.isNameValid("t "));
+    assertFalse(ValidationUtil.isNameValid(" t"));
+    assertFalse(ValidationUtil.isNameValid(" t "));
   }
 
   /**
@@ -229,34 +236,4 @@ public class ValidationUtilTest
       assertFalse(ValidationUtil.isRepositoryNameValid(path));
     }
   }
-
-  /**
-   * Method description
-   *
-   */
-  @Test
-  public void testIsUsernameValid()
-  {
-
-    // true
-    assertTrue(ValidationUtil.isUsernameValid("test"));
-    assertTrue(ValidationUtil.isUsernameValid("test.git"));
-    assertTrue(ValidationUtil.isUsernameValid("Test123.git"));
-    assertTrue(ValidationUtil.isUsernameValid("Test123-git"));
-    assertTrue(ValidationUtil.isUsernameValid("Test_user-123.git"));
-    assertTrue(ValidationUtil.isUsernameValid("test@scm-manager.de"));
-    assertTrue(ValidationUtil.isUsernameValid("test 123"));
-    assertTrue(ValidationUtil.isUsernameValid("t"));
-
-    // false
-    assertFalse(ValidationUtil.isUsernameValid(" test 123"));
-    assertFalse(ValidationUtil.isUsernameValid(" test 123 "));
-    assertFalse(ValidationUtil.isUsernameValid("test 123 "));
-    assertFalse(ValidationUtil.isUsernameValid("test/123"));
-    assertFalse(ValidationUtil.isUsernameValid("test%123"));
-    assertFalse(ValidationUtil.isUsernameValid("test:123"));
-    assertFalse(ValidationUtil.isUsernameValid("t "));
-    assertFalse(ValidationUtil.isUsernameValid(" t"));
-    assertFalse(ValidationUtil.isUsernameValid(" t "));
-  }
 }
diff --git a/scm-webapp/src/main/webapp/resources/js/override/ext.form.vtypes.js b/scm-webapp/src/main/webapp/resources/js/override/ext.form.vtypes.js
index 80a5dec976..df17eeaee7 100644
--- a/scm-webapp/src/main/webapp/resources/js/override/ext.form.vtypes.js
+++ b/scm-webapp/src/main/webapp/resources/js/override/ext.form.vtypes.js
@@ -46,7 +46,7 @@ Ext.apply(Ext.form.VTypes, {
   // name validator
   
   name: function(val){
-    return /^[A-z0-9\.\-_]+$/.test(val);
+    return val.match(/^[^ ][A-z0-9\.\-_@ ]*[^ ]$/);
   },
   
   nameText: 'The name is invalid.',
@@ -75,7 +75,7 @@ Ext.apply(Ext.form.VTypes, {
   // username validator
   
   username: function(val){
-    return val.match(/^[^ ][A-z0-9\.\-_@ ]*[^ ]$/);
+    return name(val);
   },
   
   usernameText: 'The username is invalid.'