"daveboggs" wrote:
Although I have unprotected all that I could find, I am unable to merge
cells on a particular file. Other files are OK. The merge icon is
grayed out.

Not sure whether this is what you're facing, but from Excel's Help .. :
Merge cells is one of the features that are unavailable in shared workbooks
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Max
Singapore
http://savefile.com/projects/236895
xdemechanik
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