Windows 8.1 being detected as 8.0

[jweinraub]

Sorry for posting this the other day and deleting it. My enduser told me about this issue and now I am seeing it happening for him and thought it was something else.

Anyway, I got this if statement that its supposed to do something if it is XP or Windows 8.0 to do one thing and if it is Windows Vista, 7, or 8.1 to do something else.
If I run this code on a Windows 8.1 machine, it will do the XP part of the if instead.

Any ideas as to why?

PHP Code:

${If} ${AtMostWin2003}
${OrIf} ${IsWin8}
${OrIf} ${IsWin2012}
; DoXP
${Else}
; DoVista and above
${EndIf}