I am using the UltraWebGrid from 2004, vol 1 version in a .NET 1.1 framework web application.  I have several instances, some with hidden columns, some are read only and some for data entry.  I know it might help to update the application, but that is not possible at this time.  Everything was fine until Windows 7 came along.  Now, some, not all, of the Window 7/IE 8 users are seeing an extra column on all the grids with a heading of "Edit Column" with the hotlinked word "edit" in each cell.  Other things are happening also, such as the name of the grid showing up as a button in the lower left corner. 

Has anyone else experienced this or can offer some insight.  Thanks!

Update - Uninstalled .NET framework 4 client profile and the control is working correctly again.  However, other machnes still have .NET 4 and work properly.