Microsoft warns of IE8 lock-in with XP SP3

Several additional updates are required before installing IE8 Beta 2 on Vista, including one that, if omitted, blocks its installation entirely. That fix, a revised version of a Vista Service Pack 1 (SP1) prerequisite that earlier this year sent machines into an endless series of reboots, is also necessary for IE8 Beta 2; users with SP1 will, of course, already have it in place, but those running pre-SP1 versions of Vista must still install it.

Microsoft also spelled out a long list of IE8 Beta 2 known issues and compatibility problems in release notes it posted on its support site Wednesday.

Ironically, of the nine applications called out as incompatible with the new IE8, the only two that will lock up and crash are Microsoft's.

Visual Studio.NET version 7, said Microsoft, will crash on a PC that also contains IE8 Beta 2. "No workaround is currently available," Microsoft said in the release notes.

The other Microsoft incompatible application is Windows Live Mail, formerly called Windows Live Desktop, and the desktop mail client meant to replace Outlook Express and Windows Mail. "If you install Internet Explorer 8 Beta 2, Windows Live Mail will crash when you create or reply to an e-mail message," Microsoft warned.