Javascript Editor Freeze in Visual Web Developer 2008

I have noticed this problem for a little while. Sometimes when you double click a javascript file, the source editor window becomes not responsible. If you switch to any other source code, the editor just works fine.

After search online, I found following article seemed to solve the problem.

Downloadable Hotfix: Performance and Editor fixes for Microsoft Visual Studio 2008 and Visual Web Developer Express 2008

Performance and Editor fixes for VS2008…

I downloaded the hotfix and installed it. The problem seems resolved. The only problem is that the scroll bar does not seem work.

No Scroll Bar Available

Follow instructions from Matt's blog, I verified that the Hotfix has been installed properly.

KB946581 Hotfix Installed

Not sure the reason. I have just posted a question here http://forums.asp.net/1112.aspx