Both Brent and WTI are down 1%.
From ZeroHedge:
Crude Plunges As SPR-Release Rumor Trumps QE/Isaac Efforts
UPDATE: Isaac downgrade (from potential CAT 2 to CAT 1) is helping.
In the immortal words of the movie 'Something about Mary', "we got a bleeder" in Crude oil. The front-month WTI contract just snapped over $2.50 lower as SPR-release rumors reassert on fears of Isaac's impact (and of course Jackson Hole).