SYMPTOM:
After applying the SDK Web customization called "Modifying the Look and Feel of the List View for Folder Contents on Folder Browsing Pages" it is noticed that a JavaScript error is thrown.
In Internet Explorer 8 the following error is thrown:

In Internet Explorer 9 the following error is thrown:

STEPS TO REPRODUCE:
Apply the Plugin or use the Strategy SDK Web Customization Editor as outlined in the Strategy MSDL
Home > Web SDK > Customizing Strategy Web > Part I: Fundamentals of Customization > Scenarios: Cosmetic Changes for Look and Feel > Modifying the Look and Feel of the List View for Folder Contents on Folder Browsing Pages.
See link below:
Deploying the plug-in provided with MicroStrategy SDK
CAUSE:
This is a known issue in Strategy Analytics Enterprise 9.4.1.
ACTION:
Contact Strategy Technical Support for an update on this issue.