How to get accurate values from curves using Mecanim

I´m trying to work arround the lack of event support in mecanim using curves, but I can´t get REAL and accurate values from the curve.

If I have a 0,1 curve, for example, I never get a solid 1 with GetFloat. the highest value I get is about 0.97. If I use a threshold it works... but badly. Any ideas how to make it work?

I´ve tried to get the float from Update and from FixedUpdate. Same results