After some thinking and reworking, I'm kind of settled on the skills for the Dixton setting for Fate Core. I'm hoping it's varied enough to capture the nuances of what a master thief-type character does, such as the splitting of underworld and legitimate contacts and resources, the use of a Case skill as a counterpoint to Investigation, breaking out Pilfering and Breaking from a general Burglary skill, etc. Alertness is just Notice renamed, and the same with Sneak and Stealth. The stunt list is definitely not comprehensive, and obviously doesn't include any kind of magic or powers system - which is where I'm setting my crosshairs next. Anyway, you can download the draft skills document and take a look for yourself.