responsible for the management of our client's advertising programs // this position requires an attention to detail, the ability to mulitask

-- The Now employment ad in The Now on June 26, 2009

Seeing the phrase "client expectations" tells me that there is more than one client with an advertising program, so the apostrophe should go after the S. Mulitask is not a word; perhaps the writer meant multitask. "Attention to detail", huh?