Commonwealth Bank has fixed a glitch that saw its ATM and Eftpos services crash across Australia for more than nine hours.
The bank announced its services were running properly again on its Twitter page this morning, saying: "ATM & EFTPOS services have been restored. We apologise sincerely for any inconvenience this caused. Let us know if you have further issues".
But it warned that some customers may continue to experience difficulties when selecting the "credit" option while using scheme debit cards such as Debit Mastercards.
"We are working to resolve that issue as soon as possible," Commonwealth Bank said in a statement.
Commonwealth Bank spokesman Steve Batten told ninemsn the bank's services crashed at 11pm Tuesday night and were restored at 8.30am Wednesday morning (AEDT).
He denied the glitch was caused by the leap year, saying it was a "transaction processing issue".
Customers speculated the outage occurred because the bank's computers had not been set up to recognize February 29, which only takes place every four years.
Mr Batten could not promise the glitch would not occur again, but said: "We dedicate a lot of time and resources to ensuring that our services are available to customers when they need them."
The bank was flooded with angry calls this morning from customers unable to access their accounts.
Comedian Wil Anderson joked on Twitter: "Commonwealth Bank throw a pirate party. Even worse, now when you want to make a withdrawal they just give you a map marked with an X…"
Meanwhile, the extra day in February has caused the payment system for private healthcare cards to crash, affecting 150,000 customers.
National Australia Bank-owned Health Industry Claims and Payments Service (HICAPS) warned customers may have problems using their cards for medical transactions at medical and insurance offices on February 29.
"Please be assured we are doing everything we can to fix this issue as soon as possible and expect that it will be resolved by tomorrow Thursday 1 March," the company said.