It all depends on whether or not the issue is severe. I bought a Sigma 24-60 with an extremely severe FF issue. It could NOT be corrected within the parameters that the D3/300 AF Fine Tune offers. The lens firstly needed to be repaired at Sigma, and set to initial factory specs. Now it seems OK.
And even then quite frankly, even after set to factory specs, I have had other lenses that were still not giving me the focus accuracy that I wanted, even after trying to adjust with the AF Fine tune.
You really need to check a lens thoroughly after purchasing. Make sure that you buy a lens from a reputable dealer with a liberal return policy.
Unfortunately they still test full frame lenses on DX cameras (or Canon 350d in this case which is 1.6x, I believe). On FX this lens may become a completey different animal. (The Photozone test doesn't show what corner sharpness/vignetting/CA FX users will experience.)