I was just browsing through some older threads, and felt compelled to chime in on this one. If you're using wood slabs on a full tang knife, you have to extend the wood a bit forward beyond that point, or it will split/chip off very easily. If the wood was sawn off directly at the tip of that point you have circled on the choil, look at how sharp of an angle it would form- the slightest bump can flake the wood away, exposing the tang there. This is exactly what happened to me on some beater knives I tried making, and then I learned my lesson and extended the scales forward a bit just like the original picture.
This is not an issue if you have a metal guard, or are using some synthetics like micarta.