I have a question regarding spelling sensitivity as I have experienced something that really has me scratching my head: right now I'm still using 9.3 locators in version 10.0 ArcGIS.
Typically, I use the out of the box defaults for Spelling, Candidate, and Match with a US Streets locator (80, 10, 60). This allows a little wiggle room for spelling and they've always worked for me. At one of the PSAPs I work at, the communities use Presidents names for streets. So
1600 S Lincoln Ave and
1600 S Monroe Blvd
are valid addresses
I can misspell Monroe with Monroee or Monre and get a hit. But if I spell Lincoln as Lincon, it won't find it; Lincol works. I've been misspelling others slightly and they seem to work, but LINCON is the holdout. As anyone in 9-1-1 knows, a slight misspelling is easy when you are working a LE channel and it's traffic stop time...