Disappearing drop-down box
 

I have data validation set up for serveral cells in my workbook. I have
In-cell dropdown selected, but the dropdown box does not appear. I have
removed it and re-added it, still with no avail. Data validation works
properly if I add it to a new sheet in a different workbook, so I beleive
this is linked to the specific workbook I am working on. Any suggestions?

Matt