I have this really annoying problem with my new PC and with some Googling, I find that it is a well known problem. I love the tuned out response from Microsoft on the issue from Emily Price's blog post on downloadsquad.com:
Microsoft speeds up Outlook 2007
Posted Apr 14th 2007 5:00PM by Emily Price
Yesterday Microsoft released an update to Outlook 2007 to help speed up the downloading of messages and reduce the annoying and highly criticized freezing associated with moving or deleting messages. Microsoft indicated that the problem stemmed from RSS feeds, email, and calendar files all being stored in the same .PST file which as one might imagine could grow in size rather quickly depending on the user. The problem lies not with the software, but how users are using the software. Jessica Arnold Outlook's Program Manager told ComputerWorld "Outlook wasn't designed to be a file dump, it was meant to be a communications tool...There is that fine line, but we don't necessarily want to optimize the software for people that store their e-mail in the same .PST file for ten years."
Hey there Jessica, maybe your customers want to save all their emails. Quit being a snob and get tuned in!!!