Hotfix package name: PSE450R02W2K3037.MSP
For: Computers running Windows Server 2003 with one of the following installed:

• Presentation Server 4.5 with Hotfix Rollup Pack PSE450W2K3R02

• Citrix Access Essentials 2.0 with Hotfix Rollup Pack PSE450W2K3R02

Replaces: PSE450R02W2K3001, PSE450R02W2K3005
Date: July, 2008
Language supported: English (US)
Readme version: 1.0

Important Note(s) about this Release

Caution! This hotfix may require you to edit the registry. Using Registry Editor incorrectly can cause serious problems that may require you to reinstall your operating system. Citrix cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk.

Where to Find Documentation

This document describes the issue(s) solved by this hotfix and includes installation instructions. You can find more information about Presentation Server 4.5 in the Presentation Server Administrator's Guide. All product documentation is available from the Citrix Web site at http://support.citrix.com.

Issue(s) Resolved in this Hotfix

1. Servers might experience a fatal exception on vdtw30.dll.

   [From PSE450R02W2K3001][#170153]

2. This feature enhancement allows users to control the lossiness of images through the aggressivecompression slider bar (aggressivecompression.exe).

   Invoking Image Compression in User Sessions

   Compression affects images or parts of images that are in motion in the display of a user session. A quality-control tool, the aggressivecompression.exe utility, allows end-users to adjust the level of compression applied to their sessions.

   To invoke compression in a user session, use the command aggressivecompression, which has the following syntax:

   aggressivecompression [quality] [display]

   • Set quality to an integer between 0 and 100, inclusive, representing the default severity of compression used when displaying the drawing or movement of images. 0 applies the highest level of compression. 100 applies no compression. The default quality level is 13.

   • Set display to indicate whether or not to display the slider bar in the end-user session. Use gui to display the slider bar. Use quiet to prevent displaying of the slider bar and the end-user from adjusting the compression level. By default, display is gui.

   You can use the aggressivecompression command to invoke and discontinue compression seamlessly when a user launches an application in a session. When published in place of a graphics program, the following example invokes the highest level of compression but discontinues compression after users close the graphics program:

   echo off
   aggressivecompression 0 quiet
   graphics_program
   aggressivecompression 100 quiet

   To make the aggressivecompression.exe utility available to users, use one of the following methods:

   • Launch aggressivecompression.exe (with or without command line switches) in a script that then runs the associated application for use
   • Publish aggressivecompression.exe on it’s own (with or without any needed command line switches)
   • Publish a batch script that invokes compression with a default compression level optimal for your organization; for example:

     echo off
     aggressivecompression 25 gui

     This particular example initially sets compression to 25, a higher level of compression than the default (13), but enables the end-user to modify the compression level.

   Note: Any Citrix policy that alters the default setting for Image acceleration (Not Configured) blocks the functionality of the aggressivecompression.exe utility. Users see the slider, but changing the settings has no effect.

   [From PSE450R02W2K3005][#163854]

3. Published desktops with resolutions set larger than 5120 X 1024 and 24-bit color or 15 megabytes (mb) might fail to launch.

   [From PSE450R02W2K3005][#170618]

4. Servers might experience a fatal exception, displaying a blue screen, on vdtw30.dll with bugcheck code DRIVER_PAGE_FAULT_IN_FREED_SPECIAL_POOL (d5).

   [From PSE450R02W2K3005][#183874]

5. Servers might experience a fatal exception, displaying a blue screen, on vdtw30.dll with stop code 0x8e.

   [From PSE450R02W2K3037][#171386]

6. Under certain circumstances, Terminal Services becomes unresponsive, causing the server to stop accepting connections.

   [From PSE450R02W2K3037][#184371]

7. ClearType font smoothing is not available in remote sessions running on Windows Server 2003. To enable ClearType support for remote sessions running on Windows Server 2003, you must install this fix and obtain and install Microsoft Hotfix KB946633.

   [From PSE450R02W2K3037][#185996]

8. Servers might become unresponsive over time. The issue occurs because the CPU utilization of the system thread vdtw30.dll reaches close to 100%.

   [From PSE450R02W2K3037][#186964]

9. Servers running Smart Auditor might experience a fatal exception on wdica.sys or vdtw30.dll. This is due to clients being configured for high latency which results in large mouse packets.

   [From PSE450R02W2K3037][#189918]

Installing and Uninstalling this Hotfix

Notes:

• This hotfix is packaged with Microsoft Windows Installer 3.0 as a .msp file. For more information about deploying these, see Microsoft article 884016 or visit the Microsoft Web site and search on keyword msiexec.

• To install this hotfix successfully, servers must not have registry modification restrictions in place.

• This hotfix might or might not prompt you to restart the server when the installation or uninstallation is complete. If you are using the Access Management Console, you must restart the server after installing or uninstalling this hotfix to ensure that the hotfix is added to or removed from the console's hotfix inventory list.

• If the need arises to restore the original settings and functionality provided by this hotfix, you must uninstall the hotfix before reinstalling it according to the installation instructions below.

To install this hotfix:

1. Copy the hotfix package to an empty folder on the hard drive of the server you want to update.

2. Close all applications.

3. Run the executable.

4. Restart the server.

5. If you are using the Access Management Console, restart the server to ensure the hotfix is added to the console's hotfix inventory list.

To uninstall this hotfix:

1. From the Start menu, select Settings > Control Panel.

2. In Control Panel, double-click Add/Remove Programs.

3. Highlight the hotfix you want to uninstall and click Remove.

4. Follow the directions on-screen.

5. If you are using the Access Management Console, restart the server to ensure the hotfix is removed from the console's hotfix inventory list.

Files Updated (All Dates/Times EDT)

File Name	Date	Time	Size
AggressiveCompression.exe	06/19/2008	09:51a	12,800
CPatch.exe	06/19/2008	10:30a	106,496
CPatchbackup_Files.vbs	06/19/2008	10:30a	2,885
CPatchRestore_Files.vbs	06/19/2008	10:30a	4,097
CPatchUI.dll	06/19/2008	10:30a	4,608
PS450RegBackup.vbs	06/19/2008	10:30a	4,917
UpdatePath.vbs	06/19/2008	10:30a	1,196
vdtw30.dll	06/19/2008	10:29a	741,512
wdica.sys	06/19/2008	10:29a	290,256
wfshell.exe	06/19/2008	09:51a	102,400
wdica.cat (driverfiles)	06/19/2008	10:29a	6,300
wdica.inf (driverfiles)	06/19/2008	10:29a	740
AggressiveCompressionUI.dll (en)	06/18/2008	05:17p	14,848
File Name	MD5 Checksum
PSE450R02W2K3037.msp	5F4FBCF8D2D76D75853E70197EA6DFFB
AggressiveCompression.exe	B0332A13809CB8EF2BC1F8BE2B340771
CPatch.exe	55230A44B174A002D1B950F1A5B4A698
CPatchbackup_Files.vbs	26FFE12EE9D01798C12108C535E94AE8
CPatchRestore_Files.vbs	C6F69E3FF644469BE89767173212E7FD
CPatchUI.dll	7B8DA026B8AEAC8C2EE6E3448D911F80
PS450RegBackup.vbs	5EB8AA627C1C46CC2AC34C3F7DDD35C0
UpdatePath.vbs	133861D33EA233BFC7551239C65B2D45
vdtw30.dll	31AD4B7BDBA2EA11B68A8D886A3F32C0
wdica.sys	93063E8FA71E01F287A852BD45A26D23
wfshell.exe	39CD9151E2ECD283803046CC0550A420
wdica.cat (driverfiles)	301A8549F836563E45F90665706E00B8
wdica.inf (driverfiles)	E809A6918F55C6115ACAF09804E0E81C
AggressiveCompressionUI.dll (en)	0E2E5182637373F8CCAF86C06F16F0B7

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