Re: My strat won't intonate.
Intonation is a lot more complicated than most people realise and almost every aspect of the guitar's set up will affect it. Too high a nut will make it impossible to temper the intonation at the higher frets (a process too long to explain here but which I go into in a little detail somewhere on my website, if you can find it...:cool2

as will too much arc relief.
Don't attempt to use a digital tuner; again, my website will tell you why. Learn to intonate by ear only.
There were a few Telecasters made in the last couple of years on which the bridge was incorrectly located, but I've never come across a flaw like that on a genuine Strat, be it Fender or Squier, Mex or American, although the strings height at the nut is
always too high on American Fenders...
The most likely causes are
1) magnetic weighting from the pickup pole being too close to the string
2) bad or old string
If you still have problems after going through all the excellent suggestions from the guys here, PM me...
Eltham