Adam, That is a good question. It is that way in 4.0 as well. Sent Items folder redirection is on by default. If anyone knows of a setting or something that can be made so all new users get that unchecked that would be great.
d_fisher, I don't want it because I don't want messages I send from my desktop appearing on my BB. It just clutters it up. I'm ok with emails I send from my BB to be in my sent items folder on the desktop.