intonation ?

The offset is basically in the spacing of the first or first few frets from the nut, I think. Insignificant stuff that never accounts for more than two cents. Shouldn't affect how you set the twelfth fret intonation.

thats what i thought to but when i went on the website http://www.buzzfeiten.com/ it talked about a combination of a compensated nut for like the first few frets or so doing what you said making it a few cents off then on the saddle they use off sets as well it confused me i was like ahh what did i get myself into

I don't have one. But I don't think it's a big difference that most of us would notice.

One should avoid doing bridge intonation adjustments involving the nut (12th fret harmonic) and 12th fret anyway, as it always relies on a properly installed nut -- and many nuts are not. Instead, use an electronic tuner and adjust intonation by making comparitive measurements at the 3rd (either 3rd fundamental or 15th octave harmonic) and 15th fretted note and double checking at maybe 5th and 17th in a similar fashion. This totally removes any nut effects from bridge adjustments and makes sure the bridge is set for compensation relative to the frets. Remember that only one note on any string is sounded from the nut -- all those others are fretted. I'd rather shoot for correctly compensating the majority.

If after this is done, you find the open strings and fretted strings do not tune up quite right (as is obvious by ear). It is probably time for a nut check -- both position and string heights.

Well, that's a good tip that makes sense. I've always done it with the 12th fretted note and 12th fret harmonic.