Screen flickers when starting WPF applications on Windows Server 2003 TS with ICA

When starting a session with a non-administrator account on a Windows 2003 XenApp Server, a screen flicker occurs when a Windows Presentation Foundation (WPF) application is launched in the terminal server session. Microsoft Office applications (like PowerPoint) are using the WPF for example.

When using RES Workspace Manager, the screen flicker results in a session refresh due
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Poor Session Performance with Windows 7 Clients connecting to Windows Server 2003 based XenApp

This cool article from Citrix Support shows an issue regarding Poor Session-Performance with Windows 7 Client connects to Windows Server 2003 Terminalserver. The introduction of Windows 7 clients is the only environment change noted since the beginning of the issue.

Client Operating System Windows 7 and Windows XP SP2, XenApp 5 HRP06 Farm on
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