- Poké-Powers that end your turn are receiving errata to make it clear that you still end your turn if the Poké-Power is canceled, such as with Team Galactic's Invention G-103 Power Spray or by Alakazam's "Power Cancel" Poké-Power. Unown V's correct card text should read: "(Poké-Power) VACATION - Once during your turn (before your attack), you may use this power. If you do, your turn ends. Remove 2 damage counters from each of your Pokémon. This power can't be used if Unown V is affected by a Special Condition".
Source:
Organized Play News (2009-05-01), PUI Rules Team (2009-05-07)