Thanks for the feedback. I've checked the Protection status and it doesn't
seem to be protected... I've selected: Tools, Protection and Protect Sheet.
The "Protect worksheet and contents of locked cells" box is checked by
default though...
So, to make sure, I selected, copied and pasted all cells from this
worksheet into a new workbook and from there still cannot Move or Copy the
worksheet tab.
The filename on the title bar remains unchanged. However, the hourglass
pointer is shown for a half-second. Its almost as if Excel cannot complete
the Script or Process or whatever to move a worksheet.
I'm lost...