This guy's pretty anal about iontonation, isn't he?
There's no such thing as perfect intonation all across the board. Even if you have a guitar with a compound fretboard, compensated custom nut, fanned frets, induvidually adjustable saddles etc. you still won't get perfect intonation if you don't apply exactly the right amount of pressure on the fretted string.
A little bit off key can give great depth to the music. Classical and jazz players often have non-adjustable bridges and seem to have little problems with intonation issues.
Ofcourse there are real intonation problems. But some go looking for it and if you look hard enough, you will find something.
About the locking string winding method, I hate it. It can make tuning up a nightmare because it creates a bump on the peg. It's also a hassle when you change strings, especially when you're in a hurry.
Try this:
http://www.youtube.com/watch?v=zGLMy6DbpBc
