i frequently get this message when I am updating a calendar item. I
will open the item, make whatever changes to the date, time, notes
section, then try to either save or send an update, and get the
following error message:

"this item could not be saved because it has been changed by another
user or in another window. do you want to make a copy in the default
folder for the item?"

not having any idea what is meant by the "default folder," i say no,
close the calendar item without saving (I am actually not totally sure
this ever happens with updates (i.e., when there are other
participants invited)) and then re-open it, make the changes again and
this time it lets me save them.

today for the first time i got the same message when trying to save an
email to which I had allowed images (company logo etc.) to download.

any suggestions?

thanks,
anuket