On Friday the overdraft limit on one of my bank accounts mysteriously changed. I called (of course) and was told that there has been a change-over to a new system. Apparently not all the latest account admin data made the migration. And apparently I'm not the only one affected. I've just been told of someone else who has experienced a similar problem, and they're with a different bank.

I suggest if you've made any changes to your overdraft limit in the last few weeks, it might be an idea to check those changes have stuck.