This is driving me nuts. I can't format certain cells in an Excel spreadsheet. I will right-click on a cell and select "Format Cells" and nothing happens. I will try it from the toolbar, I will try it using the Ctrl+1 shortcut, but nothing. This doesn't happen for all cells. Most of the cells I can format just fine. Of course, the ones that are formatted wrong are the very ones I can't change. I don't have any protection turned on in the worksheet. Erasing the cell contents doesn't work either. Is the worksheet corrupt or something?