Hotfix package name: HDXFlash1510WX64001.zip
For: Computers running Windows Server 2008 R2 and Windows Server 2012 with XenApp 7.5 installed
Replaces: CitrixHDXMediaStreamForFlash-ServerInstall-x64.msi
Date: October, 2014
Languages supported: English (US), German (DE), Spanish (ES), French (FR), Japanese (JA), Simplified Chinese (SC)
Readme version: 1.01

Readme Revision History

Important Notes about This Release

• This release introduces a number of fixes related to the HDX MediaStream Flash Redirection feature. For detailed information about specific versions of Internet Explorer and Adobe Flash supported by these fixes, websites we tested them against, as well as known issues and workarounds, see Knowledge Center article CTX136588.
• Caution! This release 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) resolved by this release and includes installation instructions. For additional product information, see Citrix Product Documentation.

New Fixes in This Release

1. Browsing certain Web sites with HDX MediaStream Flash Redirection enabled can cause the PseudoContainer2.exe process to exit unexpectedly.

   To enable this fix, you must set the following registry key on the server:

   HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Citrix\HdxMediaStreamForFlash\Server\PseudoServer
   Name: SupportedUrlHeads
   Type: REG_MULTI_SZ
   Data: <each value on a separate line, null separated:>
   http://
   https://
   file://

   Note: To provide a better browsing experience with HDX Flash, Citrix recommends that you also install Receiver Fix #LA5255 (Citrix Receiver for Windows 3.4 Cumulative Update 3 or its replacement) on the endpoint.

   [From HDXFlash1510WX64001][#LA4151]

2. When using Microsoft Internet Explorer 9 and later versions of the browser, if you click a link to a Flash redirected video while another Flash redirected video is already playing, the audio streams of the two videos overlap.

   This fix does not eliminate the issue, but setting the following registry key on the server allows you to shorten the amount of time during which it occurs:

   HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Citrix\HdxMediaStreamForFlash\Server\PseudoServer
   Name: UrlListForTerminationFlashInst
   Type: REG_MULTI_SZ
   Data: <URLs of affected websites; include both http:// and https://, each on a separate line; for example: http://www.youtube.com/; https://www.youtube.com/>

   [From HDXFlash1510WX64001][#LC0453]

3. When using Microsoft Internet Explorer 9 or later, Flash redirection can fail for videos embedded in websites. A black rectangle appears in place of the video.

   To enable this fix, you must set the following registry key:

   HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Citrix\HdxMediaStreamForFlash\Server\PseudoServer
   Name: WorkWithAeroEnabled
   Type: REG_DWORD
   Data: 0

   [From HDXFlash1510WX64001][#LC0477]

4. After using YouTube's built-in Search field In Microsoft Internet Explorer 8 and later versions of the browser, HDX Flash Redirection reverts to server-side rendering.

   To enable this fix, you must set the following registry key on the server:

   HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Citrix\HdxMediaStreamForFlash\Server\PseudoServer
   Name: SupportedUrlHeads
   Type: REG_MULTI_SZ
   Data: <each value on a separate line, null separated>
   http://
   https://
   file://

   Note: SupportedUrlHeads was first introduced in Fix #LA4151. It is also used by this fix. If you add SupportedUrlHeads to the Registry, Flash Redirection ignores a Flash instantiation request unless the targeted URL starts with one of the headers specified in SupportedUrlHeads.

   [From HDXFlash1510WX64001][#LC0505]

5. Flash redirection fails for videos embedded on cnn.com and msn.com. A black rectangle appears in place of the video.

   In order to enable this fix, you must set the following registry keys:

   HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Citrix\HdxMediaStreamForFlash\Server\PseudoServer\ASJSCallbacks

   For cnn.com:

   Name: cnn.com
   Type: REG_MULTI_SZ

   Data:	javaScriptLoaded
   	setQueueAutoplay
   	setAdVisibility
   	setPlayerMode
   	setAdSection
   	setAdKeyValue
   	playContent
   	getContentEntry
   	switchTrackingContext

   For msn.com:

   Name: msn.com
   Type: REG_MULTI_SZ

   Data:	MsnVideoCallback
   	MsnVideoPropertyCallback
   	GetWidgetID

   Note: This fix works only for Internet Explorer 9 and later.

   [From HDXFlash1510WX64001][#LC0665]

Fixes from Replaced Hotfixes

No hotfixes were replaced by this release.

Installing and Uninstalling this Release

Notes:

• This release is packaged as a .zip file containing the replacement CitrixHDXMediaStreamForFlash-ServerInstall-x64.msi. For more information about deploying msi files, see Microsoft article 884016 or visit the Microsoft Web site and search on keyword msiexec.
• Caution: Downgrades, also known as rollbacks, from this upgrade are not supported and might leave your systems in an unstable state. This upgrade does not patch the existing installation - it fully replaces it with a new installation. As a result, uninstalling this package removes the entire component from the computer. If the need arises to revert to an earlier version of the product, you must uninstall this package and then reinstall the earlier version of the product. Reverting to an earlier version of the product might result in the loss of settings you configure while this upgrade is installed.
• To install this package successfully, target computers 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. You must restart the server for the installation to complete.
• 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 file to a shared folder on the network.
2. Extract and save the file CitrixHDXMediaStreamForFlash-ServerInstall-x64.msi on the XenApp server or the XenDesktop VDA that you want to update.
3. Run the .msi file.
4. Restart the computer.

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.