This version of IE fully supports blocking all of those pop-ups the internet has to offer. It's very easy to access, and stands out on the tools menu. There are more options available to this instead of just blocking some of the pop-ups available at the bottom of the privacy tab in internet options. Here you can exclude some sites, or make every site you ever encounter blocked. Very handy if you want the pop up on www.weather.com to ask you for you zip code, but want everything else to be blocked.
Clear Browsing Records
Disk Cleanup made a very feeble attempt at this. When you are online, there are .temp files, temporary internet files, cookies, history, passwords, form data, and internet address that are stored on your computer. Disk Cleanup doesn't get even half of those. Microsoft has implemented this new Clear Browsing Records option under tools to do this quite nicely. It even prompts you and gives you a nice explanation of what it will do.
All major internet browsers have had this feature for some time now. Netscape, Mozilla, Opera, and Safari. I think even Konqueror and whatever the GTK+ based GNOME browser is have it. Now Microsoft has put it in Windows. Nothing really big here, except that managing a lot of downloads at one time is so much better and you can prioritize the downloads so the one you want first gets the most bandwidth.
The only other small changes that I have seen is that the default history has went from 20 days down to 14. The setup of the menus are just a little bit different, mostly due to the new features that were added. Also of interest is the new Favorites flashing star in the right hand corner of every IE and Windows Explorer window now. Right beside it is also a Search button.
Longhorn is shaping up to be an exciting release with many new features. Be sure to check out my other page with info on other aspects of build 4051 from PDC.