Thank you for looking into this one!
Here is a test project that I made that shows the problem.
There are two main differences that this project has from "clean" sample from blog article
- It uses master pages
- RadToolBar is placed on top of the form view
Here is a full project (without Rad dll)
Run WebForm1.aspx to see problem
http://test20090111.s3.amazonaws.com/RadConfirmDemo.zip
I really appreciate your help
Alexander