Outlook 2000 problems after sp3 install

We were running office 2000 with outlook 2000 sp1, upgraded to sp3 to fix a
number of nagging issues.
Before the upgrade if a user had two calendars they could open one calendar,
copy an appointment, open the second calendar and paste the appointment with
the same time and date.
Now after the update if the user tries the same thing it defaults to what
ever time is hightlighted on the second calendar, usually 8 am.

We have found two work arounds. 1. make sure the highlighted time is correct
2. Simply right drag and drop from one calendar to the other.

Is this a known bug or new feature. Is there a fix for this I could not find.