It's not a bug. It's a by product of doing an inplace search - the search
results display in list format, not in day/week/month view (so you can see
them without browsing through the months). It should return to the
day/week/month view when you clear the search - if not, make sure you have
all the latest updates installed and start outlook using the cleanviews
switch. http://www.outlook-tips.net/beginner/switches.htm
you can also use advanced find instead - it opens a new window for the
search results.