If you put a radspreadsheet inside a radtabstrip with multipage, the controls do not render properly.

In my scenario, I have a tabstrip embedded within a tabstrip, and a grid in the nested tabstrip.  That works fine.  Once you put a spreadsheet control in the multipage, the controls do not render properly. 

However, I was able to reproduce the results with the first scenario above, which is the most simple.

The ability to add comments to a cell.   This is helpful to give users understanding of the cell values.

Can this control open, edit and save Excel File from Code.
Open a File from code and not in Page_Init event.

Please provide the ability to specify splitter type of functionality where several rows could be static while the remainder of the screen would scroll.

Please provide the ability to add Tooltips to specific cells.

The Spreadsheet control looks fantastic and will help us replace existing functionality, along with building new streamlined user interfaces.

Please include the ability to specify individual cells that function as drop-downs, where we could bind the data to an external source and have the user select one of the options.