Englund said a team of core software developers who focus on bitcoin were working to fix the problem, but until it was solved some users would not be able to do anything with their bitcoins, and the affected bitcoins would appear to be "tied up" in transactions.
"Only users who make multiple transactions in a short period of time will be affected," she said.
On Tuesday, Slovenia-based Bitstamp became the second major bitcoin exchange to halt customer withdrawals in the past several days, citing "inconsistent results," and blaming a denial-of-service attack.
(Read more: CNBC Explains: How to mine bitcoins on your own)
That was a day after Mt. Gox, the best-known digital marketplace operator, said a halt on withdrawals would continue indefinitely. Traders reacted to the halt by sending the value of bitcoin to its lowest in nearly two months.
The price of bitcoin, which has gained wider acceptance in recent months, varied dramatically from one exchange to another. On Tuesday, it was quoted at $645 per coin on Bitstamp's exchange, down 6 percent on the day.
New moves by regulators
Also on Tuesday, Canada said it will toughen rules targeting money laundering and terrorist financing to keep a closer eye on the use of virtual currencies.
Meanwhile, in Washington, Benjamin Lawsky, superintendent of New York's Department of Financial Services, expects to adopt consumer disclosure rules, capital requirements and a framework for permissible investments with consumer money.
(Read more: Bitcoin falls 20% as Mt Gox highlight bug)
"Our objective is to provide appropriate guard rails to protect consumers and root out money laundering without stifling beneficial innovation," Lawsky said in a speech at the New America Foundation in Washington.