Microsoft Internet Explorer 7
Announcing IE7+
With the release of Windows Vista Beta 2, 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 version of IE7 in Vista� doesn�t roll off the tongue as easily�)These differences shouldn�t affect most web developers, but if you need to know specifically, you can refer to the OS field of the User-Agent string. As Eric noted previously, 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)
Source: IEblog