A big warning (that I’ve already fallen foul of):
Don’t run Outlook 2007 Beta and the mail scanner of the virus scanner AVG. It wipes your messages – starting with the inbox and working its way through to the archives.
Thankfully I make backups quite regularly, but I’ve still lost a few bits of mail: they really are wiped empty.
You can turn off the E-mail Scanner in AVG by going to the Control Center, double-click Email Scanner then click Disable Plugin.
Many thanks to Beyond-Teck for having the information that led me to this