Next question is, does it only happen in one, or a group of similar files,
or in all files including a fresh new workbook?
The drill is, to try and isolate the conditions under which the problem
manifests itself.....
Yes it does happen with all files whether on the PC or my USB drive,
etc. Even new files. I'll have to try the insert key when I get home to
see if that fixes it.
What version of Excel, and what Operating System? Have you recently changed
or "upgraded" either? Have you recently installed or uninstalled any other
programs or drivers of any sort?
The big black ugly square would not even go away if you just uninstall and
install again.
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