Microsoft Outlook 2007 is great and it has really improved on a lot of things for this version.
One of the things that have been messing with me is the possibility to send e-mails using Ctrl+Enter. I have accidentaly sent away a number of emails, maybe due to my thick fingers :-) when pressing Ctrl+Enter.
Outlook 2007 issues a warning when you press Ctrl+Enter and allows you to enable or disable this function. Isn’t it great - small things does matter!