The Notepad Bug still exists in vista.
Here's how to do it:
Open up Notepad, of course. Turn on 'word wrap'. Start typing. Enter some huge lines of text, ones that wrap several times. Save the document. Did you notice that the cursor position changed? Start typing again. Things get even more weird from there. Lines will no longer wrap properly. The text may get scrambled. Problems may occur. Your document may even get corrupted.
That's right, microsoft fucked up a featureless text editor.