diff -r cba4b1a0a484 core.ui/nbproject/project.xml
--- a/core.ui/nbproject/project.xml	Thu Oct 08 17:11:11 2009 +0200
+++ b/core.ui/nbproject/project.xml	Fri Oct 09 09:20:51 2009 +0200
@@ -43,7 +43,7 @@
 <project xmlns="http://www.netbeans.org/ns/project/1">
     <type>org.netbeans.modules.apisupport.project</type>
     <configuration>
-        <data xmlns="http://www.netbeans.org/ns/nb-module-project/2">
+        <data xmlns="http://www.netbeans.org/ns/nb-module-project/3">
             <code-name-base>org.netbeans.core.ui</code-name-base>
             <module-dependencies>
                 <dependency>
@@ -94,7 +94,7 @@
                     <build-prerequisite/>
                     <compile-dependency/>
                     <run-dependency>
-                        <specification-version>7.12</specification-version>
+                        <specification-version>7.17</specification-version>
                     </run-dependency>
                 </dependency>
                 <dependency>
@@ -154,6 +154,15 @@
                     </run-dependency>
                 </dependency>
             </module-dependencies>
+            <test-dependencies>
+                <test-type>
+                    <name>unit</name>
+                    <test-dependency>
+                        <code-name-base>org.netbeans.libs.junit4</code-name-base>
+                        <compile-dependency/>
+                    </test-dependency>
+                </test-type>
+            </test-dependencies>
             <public-packages/>
         </data>
     </configuration>
diff -r cba4b1a0a484 core.ui/src/org/netbeans/core/ui/notifications/FlashingIcon.java
--- a/core.ui/src/org/netbeans/core/ui/notifications/FlashingIcon.java	Thu Oct 08 17:11:11 2009 +0200
+++ b/core.ui/src/org/netbeans/core/ui/notifications/FlashingIcon.java	Fri Oct 09 09:20:51 2009 +0200
@@ -57,6 +57,7 @@
 import javax.swing.JLabel;
 import javax.swing.JToolTip;
 import javax.swing.SwingUtilities;
+import org.openide.awt.NotificationDisplayer.Priority;
 import org.openide.util.RequestProcessor;
 import org.openide.util.RequestProcessor.Task;
 
@@ -250,7 +251,8 @@
 
     public void propertyChange(PropertyChangeEvent evt) {
         if( NotificationDisplayerImpl.PROP_NOTIFICATION_ADDED.equals(evt.getPropertyName()) ) {
-            setNotification( (NotificationImpl)evt.getNewValue(), true );
+            final NotificationImpl ni = (NotificationImpl) evt.getNewValue();
+            setNotification( ni, ni.showBallon() );
             PopupList.dismiss();
         } else if( NotificationDisplayerImpl.PROP_NOTIFICATION_REMOVED.equals(evt.getPropertyName()) ) {
             NotificationImpl removed = (NotificationImpl)evt.getNewValue();
diff -r cba4b1a0a484 core.ui/src/org/netbeans/core/ui/notifications/NotificationImpl.java
--- a/core.ui/src/org/netbeans/core/ui/notifications/NotificationImpl.java	Thu Oct 08 17:11:11 2009 +0200
+++ b/core.ui/src/org/netbeans/core/ui/notifications/NotificationImpl.java	Fri Oct 09 09:20:51 2009 +0200
@@ -92,4 +92,8 @@
     public String getTitle() {
         return title;
     }
+
+    boolean showBallon() {
+        return priority != Priority.SILENT;
+    }
 }
diff -r cba4b1a0a484 core.ui/test/unit/src/org/netbeans/core/ui/notifications/NotificationImplTest.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core.ui/test/unit/src/org/netbeans/core/ui/notifications/NotificationImplTest.java	Fri Oct 09 09:20:51 2009 +0200
@@ -0,0 +1,61 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ *
+ * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
+ *
+ * The contents of this file are subject to the terms of either the GNU
+ * General Public License Version 2 only ("GPL") or the Common
+ * Development and Distribution License("CDDL") (collectively, the
+ * "License"). You may not use this file except in compliance with the
+ * License. You can obtain a copy of the License at
+ * http://www.netbeans.org/cddl-gplv2.html
+ * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
+ * specific language governing permissions and limitations under the
+ * License.  When distributing the software, include this License Header
+ * Notice in each file and include the License file at
+ * nbbuild/licenses/CDDL-GPL-2-CP.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun in the GPL Version 2 section of the License file that
+ * accompanied this code. If applicable, add the following below the
+ * License Header, with the fields enclosed by brackets [] replaced by
+ * your own identifying information:
+ * "Portions Copyrighted [year] [name of copyright owner]"
+ *
+ * If you wish your version of this file to be governed by only the CDDL
+ * or only the GPL Version 2, indicate your decision by adding
+ * "[Contributor] elects to include this software in this distribution
+ * under the [CDDL or GPL Version 2] license." If you do not indicate a
+ * single choice of license, a recipient has the option to distribute
+ * your version of this file under either the CDDL, the GPL Version 2 or
+ * to extend the choice of license to its licensees as provided above.
+ * However, if you add GPL Version 2 code and therefore, elected the GPL
+ * Version 2 license, then the option applies only if the new code is
+ * made subject to such option by the copyright holder.
+ *
+ * Contributor(s):
+ *
+ * Portions Copyrighted 2009 Sun Microsystems, Inc.
+ */
+
+package org.netbeans.core.ui.notifications;
+
+import junit.framework.TestCase;
+import org.openide.awt.NotificationDisplayer.Priority;
+
+/**
+ *
+ * @author Jaroslav Tulach <jtulach@netbeans.org>
+ */
+public class NotificationImplTest extends TestCase {
+    
+    public NotificationImplTest(String testName) {
+        super(testName);
+    }
+
+    public void testSilentMeansNoBalloon() {
+        NotificationImpl instance = new NotificationImpl();
+        instance.init("Title", null, Priority.SILENT, null, null);
+        assertFalse("No balloon", instance.showBallon());
+    }
+
+}
diff -r cba4b1a0a484 nbbuild/hudson/core-main
--- a/nbbuild/hudson/core-main	Thu Oct 08 17:11:11 2009 +0200
+++ b/nbbuild/hudson/core-main	Fri Oct 09 09:20:51 2009 +0200
@@ -26,6 +26,7 @@
     testmodule core.multiview
     testmodule core.output2
     testmodule core.startup
+    testmodule core.ui
     testmodule core.windows
     testmodule editor.mimelookup
     testmodule editor.mimelookup.impl
diff -r cba4b1a0a484 openide.awt/apichanges.xml
--- a/openide.awt/apichanges.xml	Thu Oct 08 17:11:11 2009 +0200
+++ b/openide.awt/apichanges.xml	Fri Oct 09 09:20:51 2009 +0200
@@ -47,6 +47,20 @@
 <apidef name="awt">AWT API</apidef>
 </apidefs>
 <changes>
+    <change id="Notification.SILENT">
+        <api name="awt"/>
+        <summary>Support for silent notifications</summary>
+        <version major="7" minor="17"/>
+        <date day="16" month="10" year="2009"/>
+        <author login="jtulach"/>
+        <compatibility addition="yes" binary="compatible" semantic="compatible" deprecation="no" deletion="no" modification="no"/>
+        <description>
+            New priority to show a notification but without its details initially.
+            The user can display the details baloon manually later.
+        </description>
+        <class package="org.openide.awt" name="NotificationDisplayer"/>
+        <issue number="174183"/>
+    </change>
     <change id="AlwaysEnabledAction.CheckBox">
         <api name="awt"/>
         <summary>AwlaysEnabledAction can represent a boolean key in Preferences.</summary>
diff -r cba4b1a0a484 openide.awt/nbproject/project.properties
--- a/openide.awt/nbproject/project.properties	Thu Oct 08 17:11:11 2009 +0200
+++ b/openide.awt/nbproject/project.properties	Fri Oct 09 09:20:51 2009 +0200
@@ -44,4 +44,4 @@
 javadoc.arch=${basedir}/arch.xml
 javadoc.apichanges=${basedir}/apichanges.xml
 
-spec.version.base=7.16.0
+spec.version.base=7.17.0
diff -r cba4b1a0a484 openide.awt/src/org/openide/awt/NotificationDisplayer.java
--- a/openide.awt/src/org/openide/awt/NotificationDisplayer.java	Thu Oct 08 17:11:11 2009 +0200
+++ b/openide.awt/src/org/openide/awt/NotificationDisplayer.java	Fri Oct 09 09:20:51 2009 +0200
@@ -61,6 +61,11 @@
         HIGH,
         NORMAL,
         LOW,
+        /** Priority that shows the notification without details.
+         * Details shall be shown only later, per user request.
+         * @since 7.17
+         */
+        SILENT
     }
 
     /**
@@ -149,6 +154,7 @@
                     importance = 50;
                     break;
                 case LOW:
+                case SILENT:
                     importance = 1;
                     break;
             }
diff -r cba4b1a0a484 uihandler/nbproject/project.xml
--- a/uihandler/nbproject/project.xml	Thu Oct 08 17:11:11 2009 +0200
+++ b/uihandler/nbproject/project.xml	Fri Oct 09 09:20:51 2009 +0200
@@ -86,7 +86,7 @@
                     <build-prerequisite/>
                     <compile-dependency/>
                     <run-dependency>
-                        <specification-version>6.7</specification-version>
+                        <specification-version>7.17</specification-version>
                     </run-dependency>
                 </dependency>
                 <dependency>
diff -r cba4b1a0a484 uihandler/src/org/netbeans/modules/uihandler/SlownessReporter.java
--- a/uihandler/src/org/netbeans/modules/uihandler/SlownessReporter.java	Thu Oct 08 17:11:11 2009 +0200
+++ b/uihandler/src/org/netbeans/modules/uihandler/SlownessReporter.java	Fri Oct 09 09:20:51 2009 +0200
@@ -58,6 +58,7 @@
 import javax.swing.JPanel;
 import org.openide.awt.Notification;
 import org.openide.awt.NotificationDisplayer;
+import org.openide.awt.NotificationDisplayer.Priority;
 import org.openide.util.ImageUtilities;
 import org.openide.util.NbBundle;
 
@@ -148,11 +149,14 @@
 
         NotifySnapshot(SlownessData data) {
             this.data = data;
+            NotificationDisplayer.Priority priority = Priority.SILENT;
+            // in dev builds use higher priority
+            assert (priority = Priority.LOW) != null;
             note = NotificationDisplayer.getDefault().notify(
                     NbBundle.getMessage(NotifySnapshot.class, "TEQ_LowPerformance"),
                     ImageUtilities.loadImageIcon("org/netbeans/modules/uihandler/vilik.png", true),
                     createPanel(), createPanel(),
-                    NotificationDisplayer.Priority.LOW);
+                    priority);
             if (CLEAR > 0) {
                 Installer.RP.post(new Runnable() {