Is it 64bit vista? did you try clearing the forms cache?
http://www.outlook-tips.net/beginner/formscache.htm

--
Diane Poremsky [MVP - Outlook]
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"steve shirley" wrote in message
news
I'm using Vista. Events range from 1/2 hour to most of day but nearly
always
starting & ending on same day. In the 'New Event' dialogue box I select
the
start time and as soon as I do the end date changes to the following day
so
that I have to re-select it as the start day.

"Diane Poremsky [MVP]" wrote:

Version of outlook? Are you creating all day events or timed
appointments?
What steps are you using when you create the event?

--
Diane Poremsky [MVP - Outlook]
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"steve shirley" wrote in message
...
When I enter the start time in a new event, the end date automatically
changes to the following day. How do I stop this happening. Most of
my
events start and finish on the same day so this is very irritating.