Netscape recommends that users of Communicator Standard and Professional editions download Communicator 4.07. You can find out what version of Communicator you are running by choosing About Communicator from the Help menu.

 If you are using Netscape Communicator Professional Edition (which includes Netscape Calendar, IBM Host On-Demand, and AutoAdmin) please read the information contained in these notes. In addition, you can click here to view the release notes specifically for Professional Edition.

These release notes include:

• What's New in 4.07
• Known issues

Additional information is available:

• From the Help menu, choose Help Contents
• From the Help menu, choose International Users
• Developer information
• Documentation information
• Technical notes

• Known issues in 4.0
• Known issues in 4.01
• Known issues in 4.01a
• Known issues in 4.02
• Known issues in 4.03
• Known issues in 4.04
• Known issues in 4.05

• Initial fix for a JavaScript Cache privacy vulerabilty.  For more information see Netscape Security Resources
• Update to Java Class files to resolve all currently known Year 2000 problems discovered by IBM

Navigator

• Smart Browsing's new What's Related icon for finding sites that are similar or connected to the site you are currently on.
• Smart Browsing's new Internet Keywords capability for finding sites based on search words you type in the location toolbar field.
• NetWatch menu item supporting PICS for filtering inappropriate content.
• Macromedia's Flash plug-in.
• New preference to clear the drop-down location bar history.

• Integrated support for enhanced JDK 1.1 including AWT 1.1.5, JNI,New Event Model, JDBC, Java Beans support, and printing support for applets.
• JavaScript console and ECMA compliance.

• The reported Long Filename Mail vulnerability has been fixed.
• The reported ClassLoader Java vulnerability has been fixed.

· KNOWN ISSUES · · KNOWN ISSUES ·

NavigatorNavigator

• Specifying a non-existing or bad printer as your default printer prevents Navigator or the Navigator installer from starting. Making that printer not the default fixes the problem.
• Using X-Mouse with Win98 causes problems with the bookmarks drop-down menu. If X-Mouse must be installed, the workaround is to use the keyboard to move around in the bookmarks window.
• When a page is refreshed by the Reload button or a meta tag, the actual last-modified field of an image is not being compared. Sites such as those with webcams can force a refresh by adding:

 <META HTTP-EQUIV="Pragma" CONTENT="no-cache">
 <META HTTP-EQUIV="Refresh" CONTENT="60">
• If you are running Netscape Communicator on Windows NT 3.51 using a Matrox Millennium graphics driver, an application error may occur when viewing HTML pages. Obtain an updated version of the driver (version 2.25 or later).
• Transparency does not function correctly. If an image has a background chunk, it will be visible in transparent areas and the page background will not show through. To turn on background image printing, choose Page Setup from the File menu and enable the Print Backgrounds option.
• Binary files are saved by default as HTML files when saving from an FTP server in Navigator.
• If a system halt related to the Kernel32.dll occurs, update the kernel. You can obtain the update from http://support.microsoft.com/support/kb/articles/Q148/3/36.asp. This may correct the problem.
• In a frame document, only the activated frame is printed, because only one frame can be printed at a time. To activate a frame, click on it.
• The paddings property of Style Sheets is not supported. Use topPadding, rightPadding, bottomPadding, and leftPadding instead.
• The margins property of Style Sheets is not supported. Use leftMargin, rightMargin, and bottomMargin instead.
• Width, height, and border tags for images in Style Sheets are not enabled.
• Under certain circumstances in a table cell, the EMBED tag parameter ALIGN=RIGHT causes the plugin not to be loaded or displayed. As a workaround, insert the ALIGN=RIGHT parameter in the table column and/or row descriptors.
• Win16 only AOL Instant Messenger will not launch the first time you try to open it by clicking the AIM button on the personal toolbar. It will work the second time you click the button. The same error will repeat every time you open Communicator.
• Win16 only Browser crashes when you trigger a forced and unconditional SmartUpdate JAR in awt1640.dll.

Java and JavaScript Java and JavaScript

• JavaScript 1.3 contains an ECMA-compliant fix regarding assignments such that if (a=b) is no longer interpreted as if (a==b). You can update the code or, if you want the old behavior, specify <script language="JavaScript1.2">.
• If you are using an applet that uses RMI callbacks, you must call netscape.security.PrivilegeManager.enablePrivilege("UniversalConnect") before the your first call into the RMI runtime.
• Communicator uses the CLASSPATH environment to find local .class files. If CLASSPATH is set in the user's environment, only the .jar files and directories specified in the CLASSPATH are searched. If you set your CLASSPATH, you need to make sure that all the .jar files in $MOZILLA_HOME/java/classes are in your CLASSPATH.
• A canvas or panel object will get the focus when you click on it.
• The Color(int, int, int) constructor does not throw an exception when color values are outside of the range 0..255.
• Communicator does not support getResource() from a jar file due to security issues. We suggest that developers use getResourceAsStream() instead.
• Reflection API can only access information about the classes' public fields and methods.
• Due to a semantics change of the ARCHIVE tag, all the applets loaded from the same codebase now share the classloader (they used to each get a separate one if different archives were specified).  So, if there is a name clash for a class in two different archives, the first one the classloader finds will be loaded.
• Thread.interrupt() is not implemented.
• By default, applet start and stop methods are not called when the Communicator/Navigator window is iconified. This behavior can be modified by adding the following line to your prefs.js file:  user_pref("java.applets.stop_on_iconify", true);
• Dialog box class implementation in JDK 1.1 is not backward compatible with JDK 1.0.2, so user classes that derive from java.awt.Dialog must be recompiled using a JDK 1.1 compiler.
• Inner classes currently cannot access private members of the enclosing class.

ComposerComposer

• Windows 95 and Windows 3.1 users: It is strongly recommended that you avoid adding images larger than 1 MB to the Composer window. Doing so may cause Communicator to halt.

MessengerMessenger

• If you encounter a general protection fault in msvcrt.dll when sending a message, exit Communicator.  This is caused by a .tmp file Windows limitation. See your system administrator or equivalent about removing these .tmp files from the Windows temp folder. Afterwards, you can send messages from Communicator.
• If a system halt occurs when invoking the Compose window, rename the address book file (abook.nab) located in the Program Files\Netscape\Users\<username> directory.
• A message saved as plain text (with a .txt extension) will be converted into plain text instead of in original MIME format. If you save the message to an existing file, the existing file will be replaced instead of having the message appended to it.
• If you get an error regarding expired certificates when sending/receiving signed or encrypted mail, please go to http://www.verisign.com/update/faq/index.html to update your certificate.
• If you make changes to the Advanced S/MIME Cipher Preferences in the Messenger tab of the Security Advisor dialog box, you must communicate these changes to people that you exchange encrypted mail with. To update their Certificate database information about you, send them a signed message. If you send only encrypted messages, they will not be aware of your preference changes.
• The file format for certificate import and export has changed between Communicator 4.03 and 4.04 due to the standardization of PKCS 12. Communicator 4.04 and newer imports certificates exported with older versions of Communicator. However, older versions of Communicator will not be able to import files exported with Communicator 4.04 or newer.
• When downloading a user certificate, you will be able to save the certificate for backup purposes. If the certificate chain does not yet exist on the user's machine, the certificate will be exported without the certificate chain. In this case, it is highly recommended that you save the certificate after retrieving the certificate chain by going into the Security Advisor, selecting Your Certificates and exporting the desired certificate.

Plug-insPlug-ins

• In 8-bit (256 color mode), you might experience color pallete problems while loading some plug-ins in Communicator. If this happens, minimize and then restore the window, or open a new Navigator window from the "File" menu to fix this. Running Windows in 16-bit (high color) mode will completely eliminate this problem.
• Sound files greater than 6MB are not supported in the 16 bit version and may not play back properly.
• Plug-ins installed in versions of Navigator prior to 4.0 are not automatically transferred to Communicator. Furthermore, for plug-ins to be automatically transferred from a prior 4.0x installation, the new version of Communicator must be installed into the same directory as the version from which you are upgrading. (If you install into a different directory, your plug-ins must be re-installed.)

NetcasterNetcaster

• Java and JavaScript must be enabled to run Netcaster.
• It is recommended that you select the Go Offline option from the File Menu before viewing sites offline.
• The order of the channels in the selector may change after exiting Netcaster.
• The Automatically Load Images preference (Preferences, Advanced from the Edit menu) should be checked.
• If you specify an invalid URL when adding a channel, the channel is added under My Channels, but does not appear when you select it. A green light may also appear; ignore this light.
• If you change a webtop to a channel in Channel Properties, the webtop remains on your screen. Close the webtop and when you select it again in My Channels, it appears as a channel in a Navigator window.
• If you change your Communicator preferences, such as color or font, while Netcaster is open, a system halt may occur. Change your Communicator preferences before starting Netcaster.
• The buttons in the Netcaster window may disappear depending on the font you select.
• Select a channel before modifying any security information in the Options dialog.
• Your channel settings may not be preserved if Communicator terminates abnormally.
• If you change your screen's resolution while Netcaster is running, the Netcaster window may no longer be visible.
• The display and cache size of the Castanet channels cannot be modified.
• If you add a Castanet channel by specifying its IP address and then access the channel again by specifying its DNS name, Netcaster will attempt to resubscribe to the channel.
• Unless you specifically use the Update Now command to update a channel, at most, two channels will update at the same time.
• Some of the channel preferences may not be visible until you restart Netcaster.
• If you add two channels with the same name, an error may occur.
• You cannot move a webtop, as indicated in the Netcaster NetHelp.

Web PublisherWeb Publisher

• The Web Publisher shipping with Enterprise Server 3.0 will need to be upgraded to work with Communicator 4.06 and higher. If the Web Publisher does not start correctly with Communicator, please contact your Enterprise Server administrator to install the new Web Publisher. To download this patch, please go to http://netscape.1command.com/relnotes/filelib.phtml.