As part of our ongoing efforts to continually improve Microsoft App-V, we recently released a hotfix package for July 2009 that contains the latest hotfixes for Microsoft Application Virtualization 4.5 Cumulative Update 1.

This hotfix package addresses the following issues:

• When you apply a disk quota to the profile directories of an user and when the disk quota is near the limit, the App-V client leaks paged pool memory.
• When run as a virtual application, a process that calls RegQueryMultipleValues experience unexpected errors or cannot start. For example, you receive error messages when you start or shutdown the Trapeze application and the application does not work correctly.
• When a App-V client tries to perform a publishing refresh procedure over HTTP or HTTPS, the procedureis not completed successfully. Specifically, the procedure is not completed successfully if a package contains pathnames that have Japanese characters. This problem occurs when the App-V client is running a Japanese version of Windows XP and has Internet Explorer 6 installed.
• When run as a virtual application, Microsoft Access 97 generates an error message 1008 when Access 97 is moving temporary files.
• When a Microsoft Application Virtualization 4.5 client tries to perform a publishing refresh procedure over HTTP or over HTTPS on an IPv6 network, the procedure is not completed successfully.
• When you expand a %APPDATA% environment variable to a universal naming conventions (UNC) path, application-specific failures occur when you start virtual applications.
• In environments that have a trust relationship and mapped user accounts between a Windows Domain and an MIT Kerberos realm, the Microsoft Application Virtualization 4.5 client cannot log on to a publishing server. Additionally, you receive an error message 8009030C.

For more information and details on obtaining the update see the link below:

KB973205 - Hotfix Package 4 for Microsoft Application Virtualization 4.5 Cumulative Update 1: July 2009

J.C. Hornbeck | Manageability Knowledge Engineer