I've had a similar glitch occur when attempting to use a Glamour Dispeller item. Both times were in Mor Dhona, and in both cases I was unable to use any actions, including /logout and selecting Exit Game from the main menu, and could only clear the error by ordering my PS3 to perform a force quit.

ISP: Comcast
PS3 Model: CECHA-01
Area: Mor Dhona
Frequency: Unknown but repeatable
Character Name: Brine Gildchaff
Character Level: Summoner 50 (first instance), Scholar 50 (second instance)