This article describes the Microsoft SharePoint Server 2010 issue that is fixed in the hotfix package that is dated February 22, 2011.
Issue that this hotfix package fixes
You try to view a Microsoft Visio 2010 diagram in a SharePoint Server 2010 site by using a web browser that has Silverlight disabled. In this situation, the Visio 2010 diagram is not displayed. Additionally, you receive the following error message:
Unable to retrieve data from the server. The web request failed.
Note This issue specifically occurs when the SharePoint farm includes multiple web front-end servers and there is no load balancer that keeps affinity between the web browser and the web front-end servers.
A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing the problem described in this article. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.
If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.
Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft website:
Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.
There are no prerequisites for installing this hotfix.
You have to restart IIS after you apply this hotfix.
Hotfix replacement information
This hotfix does not replace a previously released hotfix.
To use one of the hotfixes in this package, you do not have to make any changes to the registry.
This may not contain all the files that you must have to fully update a product to the latest build. This contains only the files that you must have to resolve the issue that listed in this article.
The global version of this hotfix package uses a Microsoft Windows Installer package to install the hotfix package. The dates and the times for these files are listed in Coordinated Universal Time (UTC) in the following table. When you view the file information, the date is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.
Microsoft Windows Installer .msp file information
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates