The unspecified problems affected all of the Los Gatos, Calif.-based company's 55 shipping centers and marked the biggest disruption in service since Netflix launched its DVD-by-mail subscription business nine years ago.

Normal shipments from the online DVD rental leader were expected to resume on Friday, according to Netflix spokesperson Steve Swasey.

Traffic Pileup

The company was able to send out some discs on Wednesday, but shipped none on Tuesday and wasn't able to ship discs for much of the day Thursday, Swasey said.

Technicians were able to resolve some of the problems and get some of the distribution centers up and running again Thursday, but were expected to have to work through the night to get the entire system functioning properly, Swasey said.

He declined to comment on the cause of the outage.

"We're not real big on pointing fingers or attaching blame or airing this out in public," Swasey said.

About a third of the company's 8.4 million subscribers are currently waiting for DVDs held up by the problems. Affected customers were promised a credit to their accounts for the delay.

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