WizardOz's page

ShieldLawrence is right, and well done for Timo Fey for bringing the attention back to the issue again. I’ve seen it being discussed at Reddit too.
I ain’t got the UCaP for my vigilante yet, but it is essential to know if I should count on it my build. The GM in our campaign promised to allow Leave an Opening to be triggered by a successful Acrobatics check under UCaP, noting LaO would have little sense otherwise. It’s open for interpretations though

During the playtest for the Vigilante class, I recall a developer stating that Up Close and Personal would count toward activating the Stalker Talents that rely on d8 Hidden Strike. The current wording doesn't explicitly allow it, and it hasn't made it to the FAQ so...

Does a successful acrobatics check using Up Close and Personal count as qualifying for the stalker talents marked with an asterisk (*)?

Vigilante Specialization wrote:

A stalker vigilante can apply only one talent marked with an asterisk (*) to a given hidden strike, and only when that hidden strike is dealt against a foe that is unaware of the stalker vigilante's presence (or who considers him an ally), unless otherwise noted.

Up Close and Personal wrote:

When the vigilante attempts an Acrobatics check to move through an opponent's space during a move action, he can attempt a single melee attack against that opponent as a swift action. If the Acrobatics check succeeds, this attack applies the vigilante's hidden strike damage as if the foe were unaware of the vigilante. Otherwise, the vigilante applies the hidden strike damage he would deal if the target were denied its Dexterity bonus to AC. Only a stalker vigilante of at least 4th level can select this talent.

"Applies the vigilante's hidden strike damage as if" doesn't necessarily mean that it's a "hidden strike dealt against a foe that is unaware of the vigilante's presence (or considers him an ally)." You deal damage to them as if they had the conditions, but it doesn't say you can use other abilities that require the conditions.

With a FAQ/errata, it would become explicitly "otherwise noted."