The Wikipedia article mentions other applications than notepad and implies IsTextUnicode was fixed in Vista.
Kaplan's blog post explains the change in Vista was actually in notepad (use a different algorithm) and IsTextUnicode was left broken, so the other applications mentioned in the Wiki page would presumably still be broken on Vista and above.
Kaplan's blog post explains the change in Vista was actually in notepad (use a different algorithm) and IsTextUnicode was left broken, so the other applications mentioned in the Wiki page would presumably still be broken on Vista and above.