Internet Explorer 7 Beta 2 is the latest version of Microsoft’s popular web browser. You can download and preview this version. So what is Internet Explorer 7+ ?
The IE blog explains the term IE7+
“I want to announce that we will be naming the version of IE7 in Windows Vista “Internet Explorer 7+”. While all versions of IE7 are built from the same code base, there are some important differences in IE7+, most significantly the addition of Windows Vista-only features like Protected Mode, Parental Controls, and improved Network Diagnostics. These features take advantage of big changes in Windows Vista and weren’t practical to bring downlevel. The IE7+ naming gives us an easy way to refer to this version.”
The User-Agent strings will have the info you need:
* IE7+ running on Windows Vista:
Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0)
* IE7 running on Windows XP:
Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1)
Windows Vista Beta 2 is now available for IT professionals and developers with MSDN and TechNet subscriptions.