Chipotle's made-to-order meals sometimes result in long lines that waste customers' time and cost it business, and sometimes the backup is at the cash register. So a number of Chipotles started rounding total costs to the nearest nickel so that the registers wouldn't have to deal with pennies. Some customers complained that they were overcharged two cents (and it is legally problematic to charge customers more than a stated price), so Chipotle immediately changed the policy so that receipts are rounding down and Chipotle eats the extra 1-4 cents (though they can more than make up for this by raising prices a nickel across the board). Nevertheless, a consumer-fraud class action has been filed that will surely cost more in attorneys' fees for everyone concerned than the conceivable damages to the class for the few weeks that a handful were overcharged. But save your month-old Chipotle receipt if you want to put in your claim for two cents. (The suit asserts Chipotle has been doing this since August 2008; it is wildly implausible that no attorney or consumer noticed for four years; the class representative doesn't even identify a single instance where he was personally overcharged.) [Courthouse News via LA Weekly; Star-Ledger]
It's worth noting that if class-action lawyers are finding something this ludicrous this a worthwhile use of their time, it puts the lie to the claim that the lodestar reflects real opportunity costs to the lawyers for litigating.