I'm having a problem with the signup date display in customer grid: when a customer signs up the date is wrongly entered in the database, our date format is yyyy-mm-dd, but when the day is before the 12th of the month, it switches to yyyy-dd-mm, resulting in a wrong display in customer grid. For example, if a customer signs up on 2014-08-11, it'll be displayed as 2014-11-08, but if it's 2014-08-13 it's fine. Seems like it's a native bug since we didn't touch the customer model, did anyone encountered that issue? Thanks