MVPs- Your suggestions were right on. I was experiencing the same problem-
due to enabled Protection. I had forgotten at one point that this protection
was enabled. The previous user may not realize protection was enabled at
some point in the past (i.e. if the data was copied into a new, blank
workbook, the protection carries over. Maybe a previous user has enabled
it?) Since the owner is not asked for a password upon opening the workbook,
it's not immediately apparent. Also- I found that you do not receive any
sort of error or confirmation message if you have entered the wrong or the
right password at the Disable Protection box... If it's incorrect, only a
refreshed, blank password field. If you enter the correct passoword, the
password field (screen) disappears. Luckily- I got it on the third guess,
password box simply went away and the minimize and maximize buttons returned.