Hi Benson,
You spot it rightly, I am having this particular problem only in a Web Application's Design View. I tried your suggestion, namely the devenv /resetsettings and it seems to work in a simple Web Application, but the one I work on is still without the scrollbar. Maybe the source code is too complex, but at least I got it work for main simple Web Appl.
This is a very annoying problem, which can cause headache after time,especially if you work on a more complex application.
Thank you very much for your help, I did really appreciate.
Cheers
Ben