I have heard that were numerous upgrades put in place for the 2006+ Fender MIM Standard Strats. My MIM Standard Strat was purchased in 2006 as 2005 model (likely made in very late 2005).

1) What were the 2006+ upgrades made?
2) Is there a way to tell if these improvements are on my guitar?
Well, I have an '05 and it does not have the upgrades and I'm not entirely sure exactly when the upgrades took affect (outside of knowing it was '06).

I do know that the saddles and bridge block were upgraded and may be the only way to tell visually. The new blocks are copper infused and thicker, so if you took the back plate off of a new one and yours you should be able to compare.

also, go here and also review spec sheet at bottom.