| Honorable Goblin |
The Elven Curved Blade can, indeed, be used with Weapon Finesse.
Elven Curve Blade
Price 80 gp
Type exotic
Essentially a longer version of a scimitar, but with a thinner blade, the elven curve blade is exceptionally rare. You receive a +2 circumstance bonus to your CMD whenever a foe attempts to sunder your elven curve blade because of its flexible metal.
You can use the Weapon Finesse feat to apply your Dexterity modifier instead of your Strength modifier on attack rolls with an elven curve blade that is sized for you, even though it isn't a light weapon.
Emphasis mine.
The same text appears under PRD; Core Rulebook; Equipment; Weapons; Curved Blade, Eleven (couldn't get it to link directly to that entry).
It seem to just be an oversight/typo in the feat description.