OK.  When the …\User Agent\Post Platform key (explained in the prior post) has too many items and the total length exceeds 260 characters, what happens is the javascript function windows.navigator.userAgent reports back as MSIE 6.0.

As follows – using the http://www.fiddlertool.com/ua.aspx test page:

With a HTTP_USER_AGENT string exceeding 260 characters:

image

getComponentVersion says you are running Internet Explorer 7,0,6001,18000.

window.navigator.userAgent: [Mozilla/4.0 (compatible; MSIE 6.0)]
window.navigator.appMinorVersion: [0]

 

With a string less than 260 characters

image

getComponentVersion says you are running Internet Explorer 7,0,6001,18000.

window.navigator.userAgent: [Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; WOW64; SLCC1; .NET CLR 2.0.50727; Media Center PC 5.0; InfoPath.2; .NET CLR 3.5.21022; .NET CLR 1.1.4322; WWTClient2; .NET CLR 3.5.30729; .NET CLR 3.0.30618; Zune 3.0; MS-RTC LM 8; OfficeLivePatch.0.0)]
window.navigator.appMinorVersion: [0]