In the crafting panel when crafting armor, the first digit of the stat bonus is displayed as 0 if the final result is greater than about 1.3, i.e. a bonus of +1.92 is shown as +0.92. Also in these cases, the display of stat bonuses other than the primary stat are listed as +0.00.

I have found this with both basketry and tailoring, I have not yet checked bonecraft or leatherwork.