Seems a better name for the ubiquitous and waddling email application. Anyway, apparently someone found some problems with the program, but Microsoft cleared things up:

We have confirmed with Microsoft that these unexpected behaviors are not a problem with the way Outlook is set up… It is a normal, but unexpected, behavior in this version of Outlook and Exchange.

No further comment should be necessary. This is what happens when you try to pack too many nested features into a product. I think the real world analogy is illustrated by the shift from revolvers to semi-automatic pistols by police departments. Some officers didn’t want to give up their old six shooters for the new weapons, not so much out of sentiment, but because they didn’t want to sacrifice reliability (uptime) for extra shots.