The Canadian Imperial Bank of Commerce has issued its customers another apology, after technical difficulties kept clients from getting updated account balances.

"We apologize for the inconvenience that this situation may cause for our customers," CIBC's chief information officer Mike Woeller said, after the bank traced the disruption to a software problem.

The problem occurred overnight Monday, during the bank's regular nightly transaction processing. CIBC was open for business as usual on Tuesday -- with its branches, banking machines, phone and online services remaining operational -- but some services were affected.

"Certain functionality, however, such as account balances, may not be immediately available as CIBC works to restore regular activities," the bank said in a statement.

Processing delayed transactions would continue through the evening, the bank added.

The problem is just the latest in a serious of embarrassing glitches to strike the CIBC in recent months.

Late last month, as many as 4,000 customers of President's Choice Financial were mistakenly billed by Canada Revenue Agency after the CIBC -- which administers the Loblaws banking venture -- gave the federal agency "incorrect information."

The CIBC had yet to recover from another mix-up that came to light two months earlier. That was when the bank's chief executive was compelled to apologize for a glitch which saw confidential faxes mistakenly sent to a U.S. junkyard and a Montreal shopping-cart company.

Shortly after, the bank was again forced to apologize after one of its automatic bank machines spat out Canadian Tire money in place of legal tender.

Although it has grabbed a lot of unfavourable headlines in recent months, CIBC is not the only Canadian bank to suffer the effects of a software-related problem.

Last June, a botched software upgrade affected thousands of Royal Bank customers, as salary deposits were delayed and automatic bill payments were lost.