i just looked at my visa statement, and there's a charge for $11.44 at Blockbuster that i don't think i made. then there's a return to the same blockbuster, on the same day, for $10.69. i haven't been to blockbuster, so i don't know what to do. it's the only charge that i don't understand. it' from friday, which was my day off. should i be concerned? i really don't know what to do about this. i requested a copy of the sales reciept from the bank. thoughts?