On our most recent bill, calls after 6:00 pm which were supposed to be free were charged by the minute. This resulted in an overcharge of $15. The CSR suggested that this was due to a system error and the charges would be removed. When asked that, since this was a system error, would other customers accounts be reviewed and amended, the answer was that "well customers have 90 days to complain about over charges." So a heads up, the day in question is Dec 2, 2010. There is, of course, the larger question. If they have a "system error" (based on our experience not a rare occurrence), over charge their customers, and don't take remedial steps, and since many users don't check their bills carefully, this would seem to be an all too convenient way to increase revenue. Might one suggest that since they are not notifying customers or fixing over billing even when they are aware of it, that they are engaging in premeditated theft from their customers.